Page 1 of 176. Public Input No. 140-NFPA [ Global Input ] Statement of Problem and Substantiation for Public Input

Transcription

1 of 164 4/22/2016 1:06 PM Public Input No. 140-NFPA [ Global Input ] Type your content here...globably change "cableless" to "wireless" (2) (4) (2) A ,multiple but has separate PI Annex B, item 25 Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 13:19:38 EST 2016 Resolution: The term cableless is consistent with IEC Annex A clarifies all cableless devices as using wireless technologies while not all wireless devices are cableless. Page 1 of 176

2 of 164 4/22/2016 1:06 PM Public Input No. 93-NFPA [ Global Input ] Revise the standard to make consistent the use of subplate, sub-plate, subpanel, and sub-panel. If these terms are intended to be different, a definition of subpanel is required. There is ambiguity between the use to subplate and subpanel which would be eliminated by the proposed change. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 13:58:59 EST 2015 Resolution: FR-1-NFPA Statement: The term "subpanel" is used only once in the definition of "Industrial Control Panel." Adding the term "subpanel" in parenthesis to the definition of subplate provides correlation with the use of the term "subpanel" in the definition of "industrial Control Panel". The term "sub-panel" is used only once in Annex D and does not require any revision as it is used in an example of a bill of materials entry. The term sub-plate was not found in the standard. Page 2 of 176

3 of 164 4/22/2016 1:06 PM Public Input No. 94-NFPA [ Global Input ] Harmonize the use of "clearly visible" and "plainly visible" by eliminating the use of "plainly visible". If the use of these terms is intented to denote different degrees of visibility, a definition is needed for both terms. The ambiguity of the term clearly visible and plainly visible would be eliminated by the proposed change. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 14:08:25 EST 2015 Resolution: FR-2-NFPA Statement: The only instance of clearly visible in the standard occurs in Changing clearly visible to plainly visible in this clause facilitates consistent use of the term plainly visible in the standard. Page 3 of 176

4 of 164 4/22/2016 1:06 PM Public Input No. 108-NFPA [ Section No ] The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems of industrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing at the point of connection of the supply circuit conductors to the electrical equipment of the machine. The proposed change aligns with the change in the 2014 NEC where the voltage range for low voltage equipment has been increased to 1000V. Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 14:51:27 EST 2016 Resolution: FR-3-NFPA Statement: The proposed change aligns with the change in the 2014 NEC where the voltage range for low voltage equipment has been increased to 1000V. Also a TG needs to be formed to review all other locations in the document where 600 V limit appears.and determine if a revision is required. Sections that contain reference to 600 volts are 1.1.1, , , and Table Page 4 of 176

5 of 164 4/22/2016 1:06 PM Public Input No. 153-NFPA [ Section No ] The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems of industrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing at the point of connection of the supply circuit conductors to the electrical equipment of the machine. The NEC has changed to 1000 Volts in many locations and making the change in NFPA 79 will be more consistent. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 16:17:36 EST 2016 Resolution: FR-3-NFPA Statement: The proposed change aligns with the change in the 2014 NEC where the voltage range for low voltage equipment has been increased to 1000V. Also a TG needs to be formed to review all other locations in the document where 600 V limit appears.and determine if a revision is required. Sections that contain reference to 600 volts are 1.1.1, , , and Table Page 5 of 176

6 of 164 4/22/2016 1:06 PM Public Input No. 1-NFPA [ Chapter 2 ] Chapter General. Referenced Publications The documents or portions thereof listed in this chapter are referenced within this standard and shall be considered part of the requirements of this document. 2.2 NFPA Publications. National Fire Protection Association, 1 Batterymarch Park, Quincy, MA NFPA 70, National Electrical Code, 2014 edition. NFPA 70E, Standard for Electrical Safety in the Workplace, 2015 edition. 2.3 Other Publications ANSI Publications. American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY ANSI Z535.4, Product Safety Signs and Labels, ASTM Publications. ASTM International, 100 Barr Harbor Drive, P. O. Box C700, West Conshohocken, PA ASTM B 8 B8, Standard Specification for Concentric-Lay Stranded Copper Conductors, Hard, Medium-Hard, or Soft, ASTM B 174 B174, Standard Specification for Bunch-Stranded Copper Conductors for Electrical Conductors, , reapproved ASTM B 286 B286, Standard Specification for Copper Conductors for Use in Hookup Wire for Electronic Equipment, , reapproved IEC Publications. International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20, Switzerland. IEC , Dimensions and output series for rotating electrical machines Part 1: Frame numbers 56 to 400 and flange numbers 55 to 1080, IEC , Dimensions and output series for rotating electrical machines Part 2: Frame numbers 355 to 1000 and flange numbers 1180 to 2360, IEEE Publications. IEEE, Three Park Avenue, 17th Floor, New York, NY IEEE 315/315A, Graphical Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), NEMA Publications. National Electrical Manufacturers Association, 1300 North 17th Street, Suite , Rosslyn Arlington, VA NEMA ICS 2, Industrial Control and Systems: Controllers, Contactors, and Overload Relays Rated 600 Volts, 2000, Revised 2004 Errara, NEMA MG - 1, Motors and Generators, NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), Page 6 of 176

7 of 164 4/22/2016 1:06 PM UL Publications. Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL ANSI/UL 50 UL50, Standard for Enclosures for Electrical Equipment, 2007, revised ANSI/UL 50E UL50E, Standard for Electrical Equipment, Environment Considerations, 2007, revised ANSI/UL 508 UL508, Standard for Industrial Control Equipment, 1999, Revised UL 508A UL508A, Standard for Industrial Control Panels, 2001, Revised ANSI/UL 870 UL870, Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, revised ANSI/UL 1063 UL1063, Standard for Machine-Tool Wires and Cables, 2006, revised ANSI/UL 1581 UL1581, Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001, Revised U.S. Government Publications. U.S. Government Printing Government Publishing Office, 732 North Capitol Street, NW, Washington, DC Title 29, Code of Federal Regulations, Part , Safety-Related Work Practices Other Publications. Merriam-Webster s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, References for Extracts in Mandatory Sections. NFPA 70, National Electrical Code, 2014 edition. NFPA 70E, Standard for Electrical Safety in the Workplace, 2015 edition. Referenced current SDO names, addresses, standard names, numbers, and editions. Related Public Inputs for This Document Related Input Public Input No. 2-NFPA [Chapter K] Relationship Submitter Full Name: Aaron Adamczyk Organization: [ Not Specified ] Submittal Date: Tue Jun 16 00:34:17 EDT 2015 Resolution: FR-4-NFPA Statement: Referenced current SDO names, addresses, standard names, numbers, and editions. Page 7 of 176

8 of 164 4/22/2016 1:06 PM Public Input No. 111-NFPA [ New Section after ] DOE HANDBOOK GUIDE TO GOOD PRACTICES FOR TRAINING AND QUALIFICATION OF MAINTENANCE PERSONNEL This DOE handbook gives guidance to industrial management when qualifying electrical maintenance workers to germane job tasks. It is presently used as a guide to all DOE projects and suggested by OSHA as a guide. Related Public Inputs for This Document Related Input Public Input No. 112-NFPA [New Section after ] Relationship Submitter Full Name: David Carpenter Organization: City Of Florence Alabama Submittal Date: Tue Jan 05 10:15:07 EST 2016 Resolution: The proposed text to reference the DOE Handbook in Section 2 is moved to Annex K.2 as a FR- #5. It is intended as an information resource only. Chapter 2 contains referenced publications which are considered part of the requirements of the standard. Page 8 of 176

9 of 164 4/22/2016 1:06 PM Public Input No. 117-NFPA [ Section No ] UL Publications. Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL ANSI/UL 50, Standard for Enclosures for Electrical Equipment, Revised ANSI/UL 50E, Standard for Electrical Equipment, Environment Considerations, 2007, Revised ANSI/UL 508, Standard for Industrial Control Equipment, 1999, Revised UL 508A, Standard for Industrial Control Panels, 2001, Revised ANSI/UL 870, Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, Revised ANSI/UL 1063, Standard for Machine-Tool Wires and Cables, 2006, Revised ANSI/UL 1581, Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001, Revised ANSI/UL 2556, UL Standard for Safety for Wire and Cable Test Methods, 2015 UL Standards listed have been updated/revised to newer editions. UL 2556 is the tri-national (US, Canada, Mexico) version of UL UL 1581 is being revised to move the methods to UL Rather than referencing one standard which then refers to another standard, having the direct reference is preferred. Submitter Full Name: Ronald Farr Organization: Ul Llc Submittal Date: Tue Jan 05 13:55:55 EST 2016 Resolution: There is no reference to UL 2556 in NFPA 79. Page 9 of 176

10 0 of 164 4/22/2016 1:06 PM Public Input No. 124-NFPA [ New Section after 3.3 ] TITLE OF NEW CONTENT Autotransformer Type your content here x Autotransformer: A type of transformer in which the primary and secondary coils have part of, or all of their turns in common. To provide a definition for an single winding transformer (autotransformer). Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 16:41:15 EST 2016 Resolution: Adding a definition of autotransformer would be beneficial. However, the submitter does not identify the source of the definition. Further, comparing definitions of autotransformer from various sources to the submitter s there is a confusion regarding the primary and secondary coils have part of, or all of their turns in common. Page 10 of 176

11 1 of 164 4/22/2016 1:06 PM Public Input No. 192-NFPA [ Section No ] 3.3.5* Adjustable Speed Drive. A combination of the power converter, motor, and motor mounted auxiliary devices such as encoders, tachometers, thermal switches and detectors, air blowers, heaters, and vibration sensors. Power conversion equipment that provides a means of adjusting the speed of an electric motor. [ 70 :100] Consider revising this definition as recommended to correlate with the definition in the 2014 NEC. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 21:47:57 EST 2016 Resolution: FR-18 Statement: The definition of "adjustable speed drive" is revised to correlate with the definition in the 2014 NEC. The annex material for A is revised to add the text of the Informational Note to the definition of "adjustable speed drive" in the 2014 NEC at the end of the existing text of A The definition of "adjustable speed drive system" in the 2014 NEC is added as a new section in Chapter 3 as this term is being added to Chapter 4. Page 11 of 176

12 2 of 164 4/22/2016 1:06 PM Public Input No. 104-NFPA [ New Section after ] 3.3.xx Basic protection protection against electric shock under fault-free conditions The IEC terminology protection against direct contact has been replaced with basic protection in the Ed. 6 of IEC and all other IEC standards. The terminology in NFPA 79 should align where feasible with IEC Related Public Inputs for This Document Related Input Public Input No. 105-NFPA [New Section after A.3.3.8] Public Input No. 162-NFPA [Chapter 6] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 12:04:49 EST 2016 Resolution: FR-20-NFPA Statement: The committee accepts the new definition of basic protection but adds the term protection from direct contact in parenthesis for historical reference for one revision cycle for a better understanding of the terms. The committee also accepts the new annex note. Page 12 of 176

13 3 of 164 4/22/2016 1:06 PM Public Input No. 131-NFPA [ Section No ] Cableless Wireless Control. Control devices employing wireless techniques (e.g., radio, infrared) techniques for transmitting commands and signals between a machine control system and operator control station(s) that are not connected by conductors or cables. Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 09:52:53 EST 2016 Resolution: Cableless control is globally accepted terminology used when using wireless techniques to communicate between a machine control system and operator control stations. Changing to wireless control could lead to confusion as wireless technologies can be used for other types of control (for example, between a control system and field sensors and actuators.). Note: provides a description of cableless control with essentially the same wording as the definition. Page 13 of 176

14 4 of 164 4/22/2016 1:06 PM Public Input No. 132-NFPA [ Section No ] * Cableless Wireless Operator Control Station. An operator control station that is capable of using wireless techniques (e.g., radio, infrared) techniques that are not connected by conductors or cables, to communicate with one or more machines and that incorporates a self-contained power source, such as a battery. Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 10:03:07 EST 2016 Resolution: Cableless operator control station is globally accepted terminology used when using wireless techniques to communicate between a machine control system and operator control stations. Changing to wireless control could lead to confusion as wireless technologies can be used for other types of control (for example, between a control system and field sensors and actuators.). Note: provides a description of cableless control with essentially the same wording as the definition. Page 14 of 176

15 5 of 164 4/22/2016 1:06 PM Public Input No. 193-NFPA [ Section No ] * Liquidtight Flexible Nonmetallic Conduit (LFNC). A raceway of circular cross section of various types as follows: (1) A smooth seamless inner core and cover bonded together and having one or more reinforcement layers between the core and covers, designated as Type LFNC-A; (2) A smooth inner surface with integral reinforcement within the raceway wall, designated as Type LFNC-B; (3) A corrugated internal and external surface without integral reinforcement within the conduit raceway wall, designated as LFNC-C. [ 70 :356.2] Consider revising this definition as recommended to correlate with the definition in the 2014 NEC. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 21:52:16 EST 2016 Resolution: FR-6-NFPA Statement: Revised this definition as recommended to correlate with the definition in the 2014 NEC. Page 15 of 176

16 6 of 164 4/22/2016 1:06 PM Public Input No. 142-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here NEW Add the definition of Effective Ground Fault Current Path to be copied from NEC Article 100 Effective Ground-Fault Current Path. An intentionally constructed, low-impedance electrically conductive path designed and intended to carry current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical supply source and that facilitates the operation of the overcurrent protective device or ground-fault detectors. This term is proposed in Chapter 8 and adding the definition will help users understand the term. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 14:34:37 EST 2016 Resolution: FR-57-NFPA Statement: This term was added in Chapter 8 and adding the definition will help users understand the term. Page 16 of 176

17 7 of 164 4/22/2016 1:06 PM Public Input No. 194-NFPA [ Section No ] Exposed (as applied to live energized electrical conductors or circuit parts). Capable of being inadvertently touched or approached nearer than a safe distance by a person. It is applied to parts not suitably guarded, isolated, or insulated. [ 70E :100] Consider revising this definition as recommended to correlate with the definition in the NFPA 70E. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 21:55:25 EST 2016 Resolution: Revising this definition would create an inconsistent use of terms within NFPA 79. Based on Section 1.5 the NEC is the reference document for NFPA 79 is the NEC which uses live parts. Page 17 of 176

18 8 of 164 4/22/2016 1:06 PM Public Input No. 103-NFPA [ New Section after ] 3.yy* Fault Protection protection against electric shock under single-fault conditions The IEC terminology protection against indirect contact has been replaced with fault protection in the Ed. 6 of IEC and all IEC standards. The terminology in NFPA 79 should align where feasible with IEC Related Public Inputs for This Document Related Input Public Input No. 106-NFPA [New Section after A ] Public Input No. 162-NFPA [Chapter 6] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 11:53:44 EST 2016 Resolution: FR-22-NFPA Statement: The committee accepts the new definition of the term fault protection but adds the term protection from indirect contact for historical reference for one revision cycle for a better understanding of the terms. The committee also accepts the new annex note. Page 18 of 176

19 9 of 164 4/22/2016 1:06 PM Public Input No. 195-NFPA [ Sections , ] Sections , Wet Location. Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather. [70:100] Wet Location. Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather. [70:100] Revise this definition as recommended to correlate with the definition in the 2014 NEC. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 21:58:10 EST 2016 Resolution: FR-12-NFPA Statement: Revise this definition of "wet location" by removing the word "and" and retain the definition of "dry location" as recommended to correlate with the definitions in the 2014 NEC. Page 19 of 176

20 0 of 164 4/22/2016 1:06 PM Public Input No. 112-NFPA [ New Section after ] Fine Print Note: See DOE HANDBOOK " GUIDE TO GOOD PRACTICES FOR TRAINING AND QUALIFICATION OF MAINTENANCE PERSONNEL" for guidance of qualified persons criteria germane to maintenance job tasks Give informational guidance to reconciling qualifications of maintenance workers performing electrical job tasks. Related Public Inputs for This Document Related Input Public Input No. 111-NFPA [New Section after 2.3.2] Relationship clarification and documentation Submitter Full Name: David Carpenter Organization: City Of Florence Alabama Submittal Date: Tue Jan 05 10:27:10 EST 2016 Resolution: An informational reference in Annex K.2 created (FR-5) which eliminates the need for an informational note Page 20 of 176

21 1 of 164 4/22/2016 1:06 PM Public Input No. 144-NFPA [ Section No ] Socket. See , Receptacle. This is an IEC term and should have been deleted in the 2015 edition. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 15:06:36 EST 2016 Resolution: The term socket is used in multiple locations in the standard. Each use of the term should be reviewed and its deletion considered if the definition is to be deleted. Page 21 of 176

22 2 of 164 4/22/2016 1:06 PM Public Input No. 135-NFPA [ New Section after ] Visible. Able to be seen. May require the movement of surrounding equipment or unmounting of equipment to be seen. The term is used throughout the standard and needs to be defined. Submitter Full Name: Robert Gruendel Organization: Dematic Submittal Date: Wed Jan 06 11:34:47 EST 2016 Resolution: The term visible is easily understood and the proposed definition does not add clarity to the standard. It is the dictionary Page 22 of 176

23 3 of 164 4/22/2016 1:06 PM Public Input No. 136-NFPA [ New Section after ] Visible, Clearly Able to be seen without the movement of surrounding equipment or unmounting of equipment to be seen. The term clearly (and plainly) visible are used throughout the standard and needs to be defined. Submitter Full Name: Robert Gruendel Organization: Dematic Submittal Date: Wed Jan 06 11:40:09 EST 2016 Resolution: A definition of "clearly visible" is not needed as this term has been removed from the standard by the action on FR-2. Page 23 of 176

24 4 of 164 4/22/2016 1:06 PM Public Input No. 109-NFPA [ Chapter 4 [Title Only] ] General Operating Conditions Requirements This change better reflects that the Chapter contains requirements and aligns with the title in IEC Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 14:58:09 EST 2016 Resolution: FR-13-NFPA Statement: The revised title more accurately reflects the material covered in Chapter 4. Page 24 of 176

25 5 of 164 4/22/2016 1:06 PM Public Input No. 123-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here Control voltage derived from voltage greater than 120vac. A single winding transformer (autotransformer) shall not be used to convert 120vac control voltage from greater voltage supply source (i.e.: load side of Main Disconnect Switch). Additional Proposed Changes File Name Description Approved Tapped_autotransformer.svg.png Autotransformer Use of autotransformer for control voltage, a short or open in tapped secondary will cause full primary voltage to be applied to control circuit, allowing over-voltage potential to be applied to devices not so rated. Shock and fire hazard potential.. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 16:30:37 EST 2016 Resolution: The standard currently does not allow the use of an autotransformer for control circuits. The statement prohibiting the use of autotransformers for control circuits currently exists in Clause (Control Circuit Supply). An additional statement in Chapter 4 is considered unnecessary. Page 25 of 176

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27 6 of 164 4/22/2016 1:06 PM Public Input No. 110-NFPA [ Section No ] Harmonics. The electrical equipment shall be designed to operate correctly where the harmonic distortion from the electric supply does not exceed 10 percent 12 percent of the total voltage (rms value) between ungrounded conductors for the sum of the second through fifth harmonic. An additional 2 percent of the total voltage (rms value) between ungrounded conductors for the sum of the sixth through thirtieth harmonic shall be permitted. This change aligns with changes in Ed. 6 of IEC to correct requirements for expected harmonic levels in an industrial environment. Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 15:08:22 EST 2016 Resolution: The proposed text does not align with proposed changes in IEC Ed. 6. In addition, there is no technical reference to the origin of the new harmonic levels and no substantiation is provided for why they should be increased. Page 27 of 176

28 7 of 164 4/22/2016 1:06 PM Public Input No. 155-NFPA [ Section No ] 4.4.2* Electromagnetic Compatibility (EMC). Transient suppression, isolation, or other appropriate means shall be provided where the equipment of an industrial machine generates electrical noise or transients, which can affect the operation of equipment that industrial machine. The wording has been confusing due to the use of the term "the" describing the noise generating equipment but no term used to describe which equipment could be affected. The owner or their designer needs to address what type of equipment needs to be separated from other types of equipment that are not part of the same industrial machine. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 16:28:21 EST 2016 Resolution: FR-14-NFPA Statement: The proposed revision restricts the requirement for inclusion of noise suppression techniques to only prevent adverse conditions to the machine producing or receiving the noise itself. The effects on other equipment within the surrounding area must be considered but the machine is not required to have noise suppression for other such equipment. Page 28 of 176

29 8 of 164 4/22/2016 1:06 PM Public Input No. 101-NFPA [ Section No. 4.8 ] 4.8 Available Fault Current. The available fault current at the point(s) of the supply to the each industrial control panel of a machine shall not be greater than the short-circuit current rating marked on the industrial control panel nameplate. The revised text provides clarification for machines with more than one source of supply and/or control panel. Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Sun Jan 03 15:38:08 EST 2016 Resolution: FR-15-NFPA Statement: The revised text provides clarification for machines with more than one source of supply and/or control panels. The committee agrees with the submitted substantiation as it is current practice where more than one source of supply is present. Page 29 of 176

30 9 of 164 4/22/2016 1:06 PM Public Input No. 130-NFPA [ Chapter 5 [Title Only] ] Incoming Chapter 5 Supply Circuit Conductor Terminations and Devices for Disconnecting Means and Removing Power Terminations The title of Chapter 5 is excessively long and does not very well describe the Chapter. The term supply circuit includes the concept of being "incoming" and the term "disconnecting means" includes the concept of "removing power". Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Tue Jan 05 21:02:10 EST 2016 Resolution: FR-25-NFPA Statement: The title of Chapter 5 is excessively long and does not very well describe the Chapter. The term supply circuit includes the concept of being "incoming" and the term "disconnecting means" includes the concept of "removing power". Page 30 of 176

31 0 of 164 4/22/2016 1:06 PM Public Input No. 167-NFPA [ Section No ] Each set of incoming supply circuit conductors on the line side of the disconnecting means shall be separated from all other internal conductors, including conductors of other supply circuits by either of the following: (1) Mounting the supply circuit disconnect as near as practicable to the top of the enclosure with dedicated wire bending space as in (2) Mounting the supply circuit disconnect other than at the top of the enclosure and by separating the supply circuit conductors from other internal conductors by the use of a barrier. Devices, terminal block assemblies, device mounting brackets or plates, do not constitue a barrier. Many items can be used to create a "barrier." Definitions of barrier (in 79 and 70E) do not specify what constitutes a "barrier" -- size, material, etc. Emphasis is not given to (1). JIC E3.9.3 was specific: The disconnecting means shall be mounted at the top of the control panel with no other equipment mounted directly above it. When dealing with "foreign" users who are translating into their own language, vagueness can and does lead to miss interpretation and hence, implementation. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 14:30:29 EST 2016 Resolution: The definition of barrier is located in chapter 3. Revising or explaining the definition at each location where the term is used does not add clarity or understanding to the term. Some of the items included in the proposed additional sentence such as "plates" could be used as a barrier. This section is addressing separation of the conductors, not the terminations or device mounting brackets. Page 31 of 176

32 1 of 164 4/22/2016 1:06 PM Public Input No. 187-NFPA [ Section No. 5.3 ] 5.3 Supply Incoming supply Circuit Disconnecting (Isolating) Means General. The following general requirements apply to through A supply An incoming supply circuit disconnecting means shall be provided for the following: (1) Each incoming supply circuit to a machine (2) The incoming supply circuit to a feeder system using collector wires, collector bars, slip-ring assemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines (3) Each on-board power source (e.g., generators, uninterruptible power supplies) Exception: Communication, remote control, and signaling circuits of less than 50 volts shall not be required to be provided with a supply circuit disconnecting means * Each disconnecting means required by shall be legibly marked to indicate the equipment it disconnects Where a machine is supplied by more than one incoming supply circuit, a marking shall be installed at each incoming supply circuit disconnect location denoting the location of all other incoming supply circuit disconnects The incoming supply circuit disconnecting means shall disconnect (isolate) the electrical equipment of the machine, including all control circuits, from the incoming supply circuit when required (e.g., for work on the machine, including the electrical equipment). Circuits that are not required to be disconnected by the incoming supply circuit disconnecting means shall comply with Each incoming supply circuit disconnecting means other than attachment plugs and receptacles shall be mounted within the control enclosure or immediately adjacent thereto. Exception No. 1: Externally mounted incoming supply circuit disconnecting means, whether interlocked or not interlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to be mounted up to 6 m (20 ft) away from the enclosure,provided the disconnecting means is in sight from and readily accessible to the operator. Exception No. 2: A supply An incoming supply circuit disconnecting means mounted in a separate enclosure and interlocked in accordance with with the control enclosure(s) it supplies shall be permitted to be mounted up to 6 m (20 ft) away,provided the disconnecting means is in sight from the control enclosure(s) and readily accessible to the operator. The control enclosure(s) shall be marked indicating the location of the disconnecting means. The disconnecting means shall be marked indicating the industrial machine it supplies Each incoming supply circuit disconnecting means mounted within or adjacent to the control enclosure shall be interlocked with the control enclosure in accordance with Exception: Where a supply an incoming supply circuit disconnecting means, supplying machines totaling 2 hp or less is not located within or adjacent to the control enclosure it supplies, the control enclosure shall comply with or Where a incoming supply circuit disconnecting means is an attachment plug and receptacle, the control enclosure it supplies shall comply with Where is used, a safety sign shall be provided in accordance with Section16.2. Page 32 of 176

33 2 of 164 4/22/2016 1:06 PM Where two or more disconnecting means are provided within the control enclosure for multiple supply circuits, they shall be grouped in one location where practicable. Protective interlocks for their correct operation shall be provided where a hazardous condition or damage to the machine or to the work in progress can occur Type. The incoming supply circuit disconnecting device shall be one of the following types: (1) A listed motor circuit switch (switch disconnector) rated in horsepower (2) A listed molded case circuit breaker (3) A listed molded case switch (4) An instantaneous trip circuit breaker that is part of a listed combination motor controller (5) A listed self-protected combination controller limited to single motor applications (6) An attachment plug and receptacle (plug/socket combination) for cord connection Requirements * Where the incoming supply circuit disconnecting device is one of the types in (1) through (5), the device shall fulfill all of the following requirements: (1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed) position only. Circuit breakers, molded-case switches, and self-protected combination motor controllers are permitted to have a reset (tripped) position between off (open) and on (closed). (2) Have an external operating means (e.g., handle) that complies with Exception: Power-operated switchgear need not be operable from outside the enclosure where there are other means to open it. (3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., by padlocks), independent of the door position. When so locked, remote as well as local closing shall be prevented. (4) Simultaneously disconnect all ungrounded conductors of the incoming power supply circuit. (5) Be operable, by qualified persons, independent of the door position without the use of accessory tools or devices. (6) Be rated for the application as follows: (7) The ampere rating shall be at least 115 percent of the sum of the full-load currents required for all equipment that is in operation at the same time under normal conditions of use. (8) Where rated in horsepower, the horsepower rating shall be at least equal to that which is defined by Table (B) of NFPA 70, for a locked rotor current equal to the largest sum resulting from the locked rotor currents of any combination of motors that can be started simultaneously and the full-load currents of the remaining motor and non-motor loads that can be operated at that time. (9) The voltage rating shall be at least equal to the nominal supply circuit voltage. (10) The disconnecting means shall plainly indicate whether it is in the open (off) or closed position. Page 33 of 176

34 3 of 164 4/22/2016 1:06 PM * When the incoming supply circuit disconnecting device is an attachment plug and receptacle (plug/socket combination), it shall fulfill all of the following requirements: (1) Have a load-break rating or be interlocked with a switching device that is load-break rated and complies with (6). An attachment plug and receptacle (plug/socket combination) rated greater than 20 amperes or 2 hp shall be listed as a switch-rated plug and receptacle (plug/socket combination). (2) Be of such a type and be so installed as to prevent unintended contact with live parts at any time, even during insertion or removal of the connectors. (3) Have a first-make, last-break electrical grounding contact. (4) Have a retaining means to prevent unintended or accidental disconnection where rated at more than 20 amperes. (5) Be located within sight from the operator station and be readily accessible In addition to the requirements in , an additional switching device on the machine shall be provided for routine power switching operations of the machine on and off Operating Handle The center of the grip of the operating handle of the disconnecting means, when in its highest position, shall be not more than 2.0 m (6 ft 7 in.) above the servicing level. A permanent operating platform, readily accessible by means of a permanent stair or ladder, shall be considered the servicing level for the purpose of this requirement An operating handle of the disconnecting means required by shall meet the following criteria: (1) Be readily accessible with doors in the open or closed position (2) Maintain the environmental rating of the enclosure to the degree necessary for the application when installed through the control enclosure (3) Not be restricted by the enclosure door when the door is in the open position Excepted Circuits The following circuits shall not be required to be disconnected by the main incoming supply circuit disconnecting means: (1) Lighting circuits for lighting needed during maintenance or repair (2) Attachment plugs and receptacles (plug and socket outlets) for the exclusive connection of repair or maintenance tools and equipment (e.g., hand drills, test equipment) (3) Undervoltage protection circuits that are only used for automatic tripping in the event of supply circuit failure (4) Circuits supplying equipment that are required to remain energized for satisfactory operation [e.g., temperature-controlled measuring devices, product (work in progress) heaters, program storage devices, inputs, non-motion outputs and displays ] Page 34 of 176

35 4 of 164 4/22/2016 1:06 PM The incoming supply circuits for excepted circuits shall be provided with all of the following: (1) A disconnecting means, isolating transformer, and overcurrent protection mounted in an enclosure adjacent to the main control enclosure or within the control enclosure, adjacent to the main supply circuit disconnecting means. (2) Line side (of the incoming supply circuit disconnect) input supply circuit conductors, when internal to the control enclosure, that are separate from and do not share a raceway with other conductors and that are encased in rigid or flexible conduit if longer than 460 mm (18 in.) The control interlocking circuits shall be capable of being disconnected at the control panel from which they are sourced Where the excepted circuits are not disconnected by the incoming supply circuit disconnecting means, all of the following requirements shall be met: (1) Permanent safety sign(s), shall be placed adjacent to the incoming supply circuit disconnecting operating handle(s), indicating that it does not de-energize all exposed live parts when it is in the open (off) (isolated) position as in (2) A statement containing the information from shall be included in the machine documentation. (3) A permanent safety sign shall be placed on a nonremovable part inside the control enclosure in proximity to each excepted circuit, or shall be identified by color as defined in Editorial revisions for consistence - added "incoming" in multiple locations. Also added text to correlate with PI 175. Additionally, I request the panel to consider how to differentiate between the requirements for the main incoming supply circuits/disconnects and downstream control enclosures supplied from the main control enclosure. Perhaps a task group can be created before the FR Meeting to address this issue. Related Public Inputs for This Document Related Input Public Input No. 175-NFPA [Section No ] Relationship Submitter Full Name: Daniel Neeser Organization: Eaton s Bussmann Division Submittal Date: Thu Jan 07 16:35:37 EST 2016 Resolution: FR-24-NFPA Statement: The terms incoming and supply are redundant. Supply is the more common of the two and is maintained for consistency with the remainder of the standard If a single main disconnecting means is provided on the supply side of multiple Page 35 of 176

36 5 of 164 4/22/2016 1:06 PM disconnecting means it needs to be marked to describe its purpose to differentiate it from the other disconnecting means, so that it can be operated to de-energize all supply conductors. The additional requirement would apply only if a single main is provided and only adds a marking requirement. The language in Annex A indicates that it is necessary but that is not enforceable reformatted for readability. The reference to the disconnect to be readily accessible to the operator in Exception No. 1 has been removed because the operator has access to an emergency stop and operating the disconnect during normal operation could create a safety concern New exception is added that provides another option that meets an equivalent control as the existing requirement. Language added to (4) to correlate with (5). Language added to (1) to correlate with and because the generic term circuit breaker implies inverse time and some users have taken this to mean that instantaneous trip circuit breakers are not included Item (4) is revised to correlate with other rules such as the exception to Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety afforded by this required interlocking. Page 36 of 176

37 6 of 164 4/22/2016 1:06 PM Public Input No. 134-NFPA [ Section No ] * Each disconnecting means required by shall be legibly marked to indicate the equipment it disconnects. A main disconnecting means shall be marked as main if multiple disconnecting means are supplied from the main disconnecting means. If multiple disconnecting means are provided on the load side of a main the main needs to be marked as such. This needs to be a rule rather than a vague explanatory statement in Annex A. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 11:05:23 EST 2016 Resolution: FR-24-NFPA Statement: The terms incoming and supply are redundant. Supply is the more common of the two and is maintained for consistency with the remainder of the standard If a single main disconnecting means is provided on the supply side of multiple disconnecting means it needs to be marked to describe its purpose to differentiate it from the other disconnecting means, so that it can be operated to de-energize all supply conductors. The additional requirement would apply only if a single main is provided and only adds a marking requirement. The language in Annex A indicates that it is necessary but that is not enforceable reformatted for readability. The reference to the disconnect to be readily accessible to the operator in Exception No. 1 has been removed because the operator has access to an emergency stop and operating the disconnect during normal operation could create a safety concern New exception is added that provides another option that meets an equivalent control as the existing requirement. Language added to (4) to correlate with (5). Language added to (1) to correlate with and because the generic term circuit breaker implies inverse time and some users have taken this to mean that instantaneous trip circuit breakers are not included Item (4) is revised to correlate with other rules such as the exception to Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety Page 37 of 176

38 7 of 164 4/22/2016 1:06 PM afforded by this required interlocking. Page 38 of 176

39 8 of 164 4/22/2016 1:06 PM Public Input No. 157-NFPA [ Section No ] Each supply circuit disconnecting means other than attachment plugs and receptacles shall be mounted within the control enclosure or immediately adjacent thereto. Exception No. 1: Externally mounted supply circuit disconnecting means, whether interlocked or not interlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to be mounted up to 6 m (20 ft) away from the enclosure,provided the disconnecting means is in sight from and readily accessible to the operator. the control enclosure(s) and is readily accessible. The control enclosure(s) shall be marked to indicate the location of the disconnecting means. The disconnecting means shall be marked to indicate the machine supplied. Exception No. 2: A supply circuit disconnecting means mounted in a separate enclosure and interlocked in accordance with with the control enclosure(s) it supplies shall be permitted to be mounted up to 6 m (20 ft) away,provided the disconnecting means is in sight from the control enclosure(s) and is readily accessible to the operator. The control enclosure(s) shall be marked indicating to indicate the location of the disconnecting means. The disconnecting means shall be marked indicating to indicate the industrial machine it supplies supplied. Revise the exceptions for consistency in application and terminology and to make it clear the disconnecting means must be readily accessible in all cases not just to the operator. Additionally the term operator was removed as is not defined in NFPA 79 and therefore can have different interpretations. The main rule is to have a disconnecting means within or immediately adjacent to the control enclosure. Therefore, the within sight from requirement should be from the control enclosure it supplies not from the operator whom may not be stationed at the control enclosure. Revising Exception No. in this manner will also provide consistency with Exception No. 2 which requires the disconnecting means to be within sight of the control enclosure. The word "industrial" was removed from in front of "machine in Exception No. 2 for consistency as it is not used that way anywhere else in this section. The entire Standard applies to industrial machines so it is not necessary here. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 07:06:57 EST 2016 Resolution: FR-24-NFPA Statement: The terms incoming and supply are redundant. Supply is the more common of the two and is maintained for consistency with the remainder of the standard If a single main disconnecting means is provided on the supply side of multiple Page 39 of 176

40 9 of 164 4/22/2016 1:06 PM disconnecting means it needs to be marked to describe its purpose to differentiate it from the other disconnecting means, so that it can be operated to de-energize all supply conductors. The additional requirement would apply only if a single main is provided and only adds a marking requirement. The language in Annex A indicates that it is necessary but that is not enforceable reformatted for readability. The reference to the disconnect to be readily accessible to the operator in Exception No. 1 has been removed because the operator has access to an emergency stop and operating the disconnect during normal operation could create a safety concern New exception is added that provides another option that meets an equivalent control as the existing requirement. Language added to (4) to correlate with (5). Language added to (1) to correlate with and because the generic term circuit breaker implies inverse time and some users have taken this to mean that instantaneous trip circuit breakers are not included Item (4) is revised to correlate with other rules such as the exception to Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety afforded by this required interlocking. Page 40 of 176

41 0 of 164 4/22/2016 1:06 PM Public Input No. 188-NFPA [ Section No ] * Where the supply circuit disconnecting device is one of the types in (1) through (5), the device shall fulfill all of the following requirements: (1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed) position only. Circuit breakers, molded-case switches, and self-protected combination motor controllers are permitted to have a reset (tripped) position between off (open) and on (closed). (2) Have an external operating means (e.g., handle) that complies with Exception: Power-operated switchgear need not be operable from outside the enclosure where there are other means to open it. (3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., by padlocks), independent of the door or cover position. When so locked, remote as well as local closing shall be prevented. (4) Simultaneously disconnect all ungrounded conductors of the power supply circuit. (5) Be operable, by qualified persons, independent of the door or cover position without the use of accessory tools or devices. (6) Be rated for the application as follows: (7) The ampere rating shall be at least 115 percent of the sum of the full-load currents required for all equipment that is in operation at the same time under normal conditions of use. (8) Where rated in horsepower, the horsepower rating shall be at least equal to that which is defined by Table (B) of NFPA 70, for a locked rotor current equal to the largest sum resulting from the locked rotor currents of any combination of motors that can be started simultaneously and the full-load currents of the remaining motor and non-motor loads that can be operated at that time. (9) The voltage rating shall be at least equal to the nominal supply circuit voltage. (10) The disconnecting means shall plainly indicate whether it is in the open (off) or closed position. Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety afforded by this required interlocking. Submitter Full Name: Barry Boggs Organization: Toyota Motor Engineering & Man Affilliation: Toyota Submittal Date: Thu Jan 07 16:36:26 EST 2016 Page 41 of 176

42 1 of 164 4/22/2016 1:06 PM Resolution: FR-24-NFPA Statement: The terms incoming and supply are redundant. Supply is the more common of the two and is maintained for consistency with the remainder of the standard If a single main disconnecting means is provided on the supply side of multiple disconnecting means it needs to be marked to describe its purpose to differentiate it from the other disconnecting means, so that it can be operated to de-energize all supply conductors. The additional requirement would apply only if a single main is provided and only adds a marking requirement. The language in Annex A indicates that it is necessary but that is not enforceable reformatted for readability. The reference to the disconnect to be readily accessible to the operator in Exception No. 1 has been removed because the operator has access to an emergency stop and operating the disconnect during normal operation could create a safety concern New exception is added that provides another option that meets an equivalent control as the existing requirement. Language added to (4) to correlate with (5). Language added to (1) to correlate with and because the generic term circuit breaker implies inverse time and some users have taken this to mean that instantaneous trip circuit breakers are not included Item (4) is revised to correlate with other rules such as the exception to Stating that the disconnect must be interlocked with the door limits the requirement to enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so clarifying this requirement includes both doors and covers improves the intended safety afforded by this required interlocking. Page 42 of 176

43 2 of 164 4/22/2016 1:06 PM Public Input No. 84-NFPA [ Section No ] Devices shall be provided for disconnecting (isolating) electrical equipment to enable work to be performed when it is de-energized and isolated. Revise to: Electrical equipment shall be provided a means of disconnecting (isolating) which establishes an electrically safe work condition. Current statement is somewhat vague with the use of the pronoun "IT". Disconnecting Means, or the equipment. NFPA 79, is limited in scope to only De-energized and Isolated - neither of which are defined in Chapter 3. However, NFPA 70E Article 120 uses the term "Establishing an Electrically Safe Work Condition" - which is also defined in Article "Electrically Safe Work Condition" - " A state in which an electrical conductor or circuit part has been disconnected from energized parts, locked/tagged in accordance with established standards, tested to ensure the absence of voltage, and grounded if determined necessary." Submitter Full Name: Earl Sowders Organization: Toyota Engineering Submittal Date: Tue Dec 15 15:04:05 EST 2015 Resolution: The disconnecting (isolating) means does not create an electrically safe working condition. Creating an electrically safe working condition is a process that includes additional steps beyond just operating and locking or tagging a disconnecting means. (See of NFPA 70E). Page 43 of 176

44 3 of 164 4/22/2016 1:06 PM Public Input No. 162-NFPA [ Chapter 6 ] Chapter * General. Protection from Electrical Hazards Electrical equipment shall provide protection of persons from electric shock, from direct and indirect contact by basic protection (see 6.2 and 6.4) and fault protection (see 6.3 and 6.4), and warn of potential arc-flash hazards (see 6.6). 6.2 * Basic Protection Against Direct Contact. Live parts General. For each circuit and part of the electrical equipment operating at 50 volts rms ac or 60 volts dc or more shall be guarded against contact, the basic protection (see 3.3.xx) requirements of or shall be applied Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions Protection 3 Protection by Enclosures Direct Contact from Outside an Enclosure. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure ) Figure Jointed Test Finger. Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Figure The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction. Page 44 of 176

45 4 of 164 4/22/2016 1:06 PM Enclosure Interlocking. When required by , each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed. Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of * Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain access without removing power The interlocking means shall meet the following requirements: (1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock (2) Be reactivated automatically when the door(s) is closed (3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action Where provided with a defeat mechanism as permitted in (1), live parts mounted on the inside of doors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question Enclosure Access. When a qualified person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met: (1) The use of a key or tool shall be required for opening the enclosure. (2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be any direct contact with live parts. 6.3 Protection Against Electric Shock from Indirect Contact (Fault Conditions) Fault Protection General * General. Page 45 of 176

46 5 of 164 4/22/2016 1:06 PM Protection against indirect contact Fault protection (see yy ) is intended to prevent hazardous conditions to continue in the event of a fault condition (e.g., insulation failure between situations due to an insulation fault between live and exposed conductive parts ) * Protection Against Indirect Contact. Protection against indirect contact shall be achieved by the following. For each circuit part or part of the electrical equipment, at least one of the following measures shall be applied : (1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation (see ), or (2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductors affected by the automatic operation of a protective device in case of a fault) (see ) Protection by Double Insulation. Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be as follows: (1) Protection by use of double insulation is intended to prevent the occurrence of hazardous touch voltages on the accessible parts through a failure in the basic insulation. (2) When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to be protected by a system of double insulation, or its equivalent. Where such a system is employed, the equipment shall be distinctively marked Protection by Automatic Disconnection of Supply. Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protective device in the event of a fault is intended to prevent an exposure to a continuous hazardous touch voltage. These protective measures comprise both of the following: (1) Protective bonding of exposed conductive parts (see 8.2.3) (2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event of a fault 6.4 Protection by the Use of Protective Extra Low Voltage (PELV) General Requirements. The use of PELV, as described in Section 6.4, is to protect persons against electric shock from indirect contact and limited area direct contact. Page 46 of 176

47 6 of 164 4/22/2016 1:06 PM PELV circuits shall satisfy all of the following conditions: (1) The nominal voltage shall not exceed the following: (2) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally dry locations and when large area contact of live parts with the human body is not expected (3) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases (4) One side of the circuit or one point of the source of the supply of that circuit shall be connected to the equipment grounding circuit. (5) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separation shall be not less than that required between the primary and secondary circuits of a safety isolating transformer. (6) Conductors of each PELV circuit shall be physically separated from those of any other circuit. When this requirement is impracticable, the insulation provisions of shall apply. (7) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform to the following: (8) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltage systems. (9) Receptacles (socket-outlets) shall not admit plugs of other voltage systems Sources for PELV. The source for PELV shall be one of the following: (1) A safety isolating transformer (2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer (e.g., a motor generator with winding providing equivalent isolation) (3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit (e.g., a diesel-driven generator) (4) An identified electronic power supply conforming to standards specifying measures to be taken to ensure that, even in the case of an internal fault, the voltage at the outgoing terminals does not exceed the values specified in (1) 6.5 Protection Against Residual Voltages Live parts having a residual voltage greater than 60 volts after the supply has been disconnected shall be reduced to 60 volts or less within 5 seconds after disconnection of the supply voltage. Exception No. 1: Exempted from this requirement are components having a stored charge of 60 microcoulombs or less. Exception No. 2: Where such a provision would interfere with the functioning of the equipment, a durable safety sign drawing attention to the hazard and stating the delay required before entry to the enclosure is allowed shall be displayed at an easily visible location on or immediately adjacent to the enclosure containing the capacitance The withdrawal of plugs or similar devices, which results in the exposure of conductors (e.g., pins), shall have a discharge time that does not exceed 1 second. Exception No. 1: Exempted from this requirement are components having a stored charge of 60 microcoulombs or less. Exception No. 2: Exempted from this requirement are conductors that are protected against direct contact Discharge of Stored Energy. Page 47 of 176

48 7 of 164 4/22/2016 1:06 PM Capacitors shall be provided with a means of discharging stored energy. [70:460.6] Time of Discharge. The residual voltage of a capacitor shall be reduced to 50 volts, nominal, or less, within 1 minute after the capacitor is disconnected from the source of supply. [70:460.6(A)] Means of Discharge. The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitor bank, or provided with automatic means of connecting it to the terminals of the capacitor bank on removal of voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used. [70:460.6(B)] 6.6 Arc Flash Hazard Warning. A safety sign shall be provided in accordance with Additional Proposed Changes File Name Description Approved Chapter_6_PI162_.docx PI162 with edits shown correctly NOTE: The online editing system may not be correctly showing the proposed changes. Please see attached document with highlighted edits for proper review of this public input. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC In addition, some of the sections were renumbered to correct a numbering issue with in the 2015 edition and to group the enclosure related clauses together. Related Public Inputs for This Document Related Input Public Input No. 103-NFPA [New Section after ] Public Input No. 104-NFPA [New Section after 3.3.8] Public Input No. 184-NFPA [Section No. A.6.2] Public Input No. 185-NFPA [Section No. A ] Public Input No. 186-NFPA [Section No. A ] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Thu Jan 07 13:49:22 EST 2016 Resolution: FR-28-NFPA Page 48 of 176

49 8 of 164 4/22/2016 1:06 PM Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Moving A to A PI162 moved reference section. Page 49 of 176

50 This data is the property of Schenck Process, LLC. The infonnation contained hereon is to be treated in confidence and is not to be used directly or indirectly in any way detrimental to our interests. Chapter 6 Protection from Electrical Hazards 6.1* General. Electrical equipment shall provide protection of persons from electric shock, by basic protection (see 6.2 and 6.4) and fault protection (see 6.3 and 6.4) from direct and indirect contact, and warn of potential arc-flash hazards. 6.2* Basic Protection Against Direct Contact General For each circuit and part of the electrical equipment Live parts operating at 50 volts rms ac or 60 volts dc or more, the basic protection (see 3.3.xx) requirements of or shall be applied. shall be guarded against contact Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions Protection by Enclosures Protection by Enclosures. Direct Contact from Outside an Enclosure. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure ) Figure Jointed Test Finger. Page 50 of 176

51 Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Figure The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction Enclosure Interlocking. When required by , each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed. Page 51 of 176

52 Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of * Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain access without removing power The interlocking means shall meet the following requirements: 1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock 2) Be reactivated automatically when the door(s) is closed 3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action Where provided with a defeat mechanism as permitted in (1), live parts mounted on the inside of doors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question Enclosure Access. When a qualified person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met: 1) The use of a key or tool shall be required for opening the enclosure. 2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be any direct contact with live parts. 6.3 Fault Protection Against Electric Shock from Indirect Contact (Fault Conditions) * General. Fault Pprotection against indirect contact (see 3.3.yy20.2) is intended to prevent hazardous conditions to continue in the event of an insulation fault condition (e.g., insulation failure between live and exposed conductive parts) * Protection Against Indirect Contact. For each circuit part or part of the electrical equipment, at least one of the following measures shall be applied: Protection against indirect contact shall be achieved by the following: 1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation (see ), or 2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductors affected by the automatic operation of a protective device in case of a fault) (see ) Protection by Double Insulation. Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be as follows: Page 52 of 176

53 1) Protection by use of double insulation is intended to prevent the occurrence of hazardous touch voltages on the accessible parts through a failure in the basic insulation. 2) When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to be protected by a system of double insulation, or its equivalent. Where such a system is employed, the equipment shall be distinctively marked Protection by Automatic Disconnection of Supply. Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protective device in the event of a fault is intended to prevent an exposure to a continuous hazardous touch voltage. These protective measures comprise both of the following: 1) Protective bonding of exposed conductive parts (see 8.2.3) 2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event of a fault remain unchanged Page 53 of 176

54 9 of 164 4/22/2016 1:06 PM Public Input No. 137-NFPA [ Section No. 6.1 ] 6.1* General. Electrical equipment shall provide protection of persons from electric shock, from direct and indirect contact, and warn of potential arc-flash hazards. Electric equipment does not warn of anything. It is already repetitive to have the rule in 6.6 but this is worse. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 12:17:02 EST 2016 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Moving A to A PI162 moved reference section. Page 54 of 176

55 0 of 164 4/22/2016 1:06 PM Public Input No. 97-NFPA [ Section No. 6.2 ] 6.2 * Protection Against Direct Contact. Live parts operating at 50 volts rms ac or 60 volts dc or more shall be guarded against contact Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which the insulation is subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock under normal operating conditions Protection by Enclosures Direct Contact from Outside an Enclosure. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure ) Figure Jointed 2 Jointed Test Finger. 4 Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Figure The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction Enclosure Interlocking. Page 55 of 176

56 When required by , each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed. 4 Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of * Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain access without removing power The interlocking means shall meet the following requirements: (1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to defeat the interlock (2) Be reactivated automatically when the door(s) is closed (3) Prevent closing of the disconnecting means while the door of the enclosure containing the disconnect is open, unless an interlock is operated by deliberate action Where provided with a defeat mechanism as permitted in (1), live parts mounted on the inside of doors that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question Enclosure Access. When a qualified person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met: (1) The use of a key or tool shall be required for opening the enclosure. (2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be any direct contact with live parts. Section 6.2 contains two main sub-sections (protection by insulation) and (protection by enclosures). The current sub-section numbering does not show the enclosure requirements as part of the sub-section. The correction places all enclosure related requirements under the sub-section. Page 56 of of 164 4/22/2016 1:06 PM

57 2 of 164 4/22/2016 1:06 PM Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 20:10:58 EST 2015 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Moving A to A PI162 moved reference section. Page 57 of 176

58 3 of 164 4/22/2016 1:06 PM Public Input No. 128-NFPA [ Section No ] * Direct Contact from Outside an Enclosure. Equipment enclosures and enclosure openings shall meet the requirements of ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure ) Figure Jointed Test Finger. Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as protection from electrical shock shall be determined by using a test finger as described in Annex A Figure The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger shall not encounter live parts in any direction. Delete the Figure in and relocate it to Annex A in *6.2.3 as it is more appropriate for fabricating a finger that what needs to be in the body of the document. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Page 58 of 176

59 4 of 164 4/22/2016 1:06 PM Submittal Date: Tue Jan 05 20:31:02 EST 2016 Resolution: Figure was retained as normative requirement and cannot be located in an informative annex. The regulations governing the the development of NFPA Standards do not permit requiring compliance with annex material, Page 59 of 176

60 5 of 164 4/22/2016 1:06 PM Public Input No. 191-NFPA [ Section No [Excluding any Sub-Sections] ] When required by , each disconnecting means mounted within or adjacent to a control enclosure that contains uninsulated live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed. Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of Adding the term uninsulated as recommended with bring consistency with in UL 508A which requires the door to be interlocked with the disconnecting means where the door gives access to uninsulated live parts operating at 50 volts ac or 60 volts dc or more. Submitter Full Name: Mark Hilbert Organization: MR Hilbert Electrical Inspecti Submittal Date: Thu Jan 07 21:43:44 EST 2016 Resolution: The intent of is to require interlocks as a primary option. Exceptions provide alternatives when there are equivalent safety features. UL 508A is based on requirements found in NFPA 79. If it is misworded, correlation responsibility is with the UL standard. Page 60 of 176

61 6 of 164 4/22/2016 1:06 PM Public Input No. 95-NFPA [ Section No [Excluding any Sub-Sections] ] When required by , each disconnecting means mounted within or adjacent to a control enclosure that contains live exposed parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed. Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be provided that meets the requirements of Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to memory elements and their support logic requiring power at all times to maintain information storage shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided that meets the requirements of Adding the term "exposed" would further clarify the requirement related to section 6 - protection from electrical hazards. Control panel designs which eliminate the exposure to electrical hazards shall not be required to satisfy Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 19:42:12 EST 2015 Resolution: By the definition of exposed, enclosed parts are not exposed. So, the live parts would be exposed only when the door is open, not all the time. See action taken and statement on PI 191. Page 61 of 176

62 7 of 164 4/22/2016 1:06 PM Public Input No. 81-NFPA [ Section No ] Where provided with a defeat mechanism as permitted in (1), live parts mounted on the inside of doors (as well as other live parts inside the enclosure) that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question. Additional Proposed Changes File Name PC_18_HELD.pdf Description Approved PC 18 - Held Note: This Public Input originated as Public Comment No. 18 and was reported at as "Reject but Hold" in the F2014 Second Draft Report for NFPA 79, per the Regs at Submitter's Substantiation: This section only includes components on a door but excludes other components in the cabinet and it is not tied to section 6.2 clearly. Submitter Full Name: TC on EEI-AAA Organization: NFPA Submittal Date: Tue Dec 15 09:58:59 EST 2015 Resolution: The requirement in is intended only for live parts mounted on the inside of the door. No substantiation has been provided to require all live parts operating over 50 volts in an enclosure to be guarded to the same degree of protection. Hazards associated with live parts mounted inside the enclosure are addressed elsewhere in this section. Page 62 of 176

63 8/27/13 TerraView Public Comment No. 18-NFPA [ Section No ] Where provided with a defeat mechanism as permitted in (1), live parts mounted on the inside of doors (as well as other live parts inside the enclosure) that are operating at over 50 volts shall be protected from unintentional direct contact by the inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any of the live parts in question. Statement of Problem and Substantiation for Public Comment This section only includes components on a door but excludes other components in the cabinet and it is not tied to section 6.2 clearly. Submitter Full Name: RICHARD TRAINOR Organization: TUV SUD AMERICA Submittal Date: Fri Apr 26 15:26:52 EDT 2013 Committee Action: Rejected but held Resolution: Copyright Assignment There is no link to a PI, or FR therefore this is new material. I, RICHARD TRAINOR, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright assignment. By checking this box I affirm that I am RICHARD TRAINOR, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature Page 63 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 9/41

64 8 of 164 4/22/2016 1:06 PM Public Input No. 143-NFPA [ Section No. 6.4 ] 6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits General Requirements. The use of PELV, as described in Section 6.4, is to protect persons against electric shock from indirect contact and limited area direct contact. Class 2 circuits as covered in NEC Article 725 shall be permitted to be used to provide protection from electric shock and other hazards PELV circuits shall satisfy all of the following conditions: (1) The nominal voltage shall not exceed the following: (2) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally dry locations and when large area contact of live parts with the human body is not expected (3) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases (4) One side of the circuit or one point of the source of the supply of that circuit shall be connected to the equipment grounding circuit. (5) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separation shall be not less than that required between the primary and secondary circuits of a safety isolating transformer. (6) Conductors of each PELV circuit shall be physically separated from those of any other circuit. When this requirement is impracticable, the insulation provisions of shall apply. (7) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform to the following: (8) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltage systems. (9) Receptacles (socket-outlets) shall not admit plugs of other voltage systems Sources for PELV. The source for PELV shall be one of the following: (1) A safety isolating transformer (2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer (e.g., a motor generator with winding providing equivalent isolation) (3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit (e.g., a diesel-driven generator) (4) An identified electronic power supply conforming to standards specifying measures to be taken to ensure that, even in the case of an internal fault, the voltage at the outgoing terminals does not exceed the values specified in (1) Class 2 circuits should be included as a means of providing protection. Submitter Full Name: Paul Dobrowsky Page 64 of 176

65 9 of 164 4/22/2016 1:06 PM Organization: Innovative Technology Services Submittal Date: Wed Jan 06 14:49:04 EST 2016 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Moving A to A PI162 moved reference section. Page 65 of 176

66 0 of 164 4/22/2016 1:06 PM Public Input No. 80-NFPA [ New Section after 6.6 ] 6.7 (NEW) Protection From Contrary Control Circuit Short Control equipment or controllers which can create an electrical hazard when actuated or engaged at the same time (e.g. Reversing or Wye-Delta start), shall be both mechanically and electrically interlocked, to prevent hazardous simultaneous actuation. Actuation of Wye-Delta configured components, without interlocking can create a short between A and C Phases, resulting in an electrical hazard and possibly and Arc Flash event. Manual actuation of contactors is common with troubleshooting. Submitter Full Name: Earl Sowders Organization: Toyota Engineering Submittal Date: Fri Dec 11 12:33:32 EST 2015 Resolution: Mechanical interlocks will not prevent an accident if the interlocks are defeated. Only qualified persons are allowed to troubleshoot and should be aware of the hazards associated with Wye-Delta configured components. This is not a shock related hazard and it should be addressed in Chapter 9. Requirement for reverse interlocking type controllers are found in Page 66 of 176

67 1 of 164 4/22/2016 1:06 PM Public Input No. 125-NFPA [ Section No ] A circuit breaker, self-protected combination motor controller, or a manual motor controller suitable as tap conductor protection in group installations, or othe devices (i.e.: frequency motor controller (inverter)) marked with a slash rating, such as 120/240V or 480Y/277V, shall be applied in a solidly grounded circuit where the nominal voltage of any conductor to ground does not exceed the lower voltage rating and the nominal voltage between any two conductors does not exceed the higher voltage rating. When slash-rated devices are connected to the supply circuit of the machine, the nameplate voltage rating in (3) shall not exceed the lower voltage rating or shall include the complete slash rating. When slash rated devices are connected to the secondary of a transformer forming part the electrical equipment of the machine, the transformer secondary shall be grounded such that the line-to-line voltage for each phase and voltage to ground for any pole do not exceed the respective slash ratings. Limiting the devices that need to be considered to be powered by "grounded" circuit where applied nominal voltage to ground rating of the device is exceeded. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 17:09:34 EST 2016 Resolution: This section for overcurrent protection and any specific component rating requirements may be better suited for Chapter 4. Page 67 of 176

68 2 of 164 4/22/2016 1:06 PM Public Input No. 98-NFPA [ Section No ] Control circuit conductors sizes of 18, 16, and 14 AWG shall be considered as protected by an overcurrent device(s) of not more than a 20-ampere rating. Delete 18 and 16 AWG from the text; permitting 20 amperes of current goes against the known continuous ampacities of these conductors. Otherwise, add explanatory material for this sub-section. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Sun Dec 27 20:23:17 EST 2015 Resolution: There is no substantiation provided for deletions of AWG conductors from this section. Control circuits are protected by design for overload and short circuit protection is provided for protection of conductors. Page 68 of 176

69 3 of 164 4/22/2016 1:06 PM Public Input No. 83-NFPA [ Section No ] Rating and Setting of Overcurrent Protective Devices. Motor controllers shall be provided in accordance with Article 430, Part VII, of NFPA * Page 69 of 176

70 4 of 164 4/22/2016 1:06 PM Each motor controller and its associated wiring shall be protected as an individual branch circuit by a shortcircuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table Table Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller Fuse Class with Non Time Delay Full-Load Current (%) AC-2 AC-3 AC-4 R CF or J CC T Type of Application 2 Fuse Class with Time Delay 1 AC-2 AC-3 AC-4 RK RK CF or J CC Instantaneous trip circuit breaker Inverse trip circuit breaker Note: Where the values determined by this table do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possible setting shall be permitted. 1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non time-delay Class CC, J, CF, or T fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current. 2 Types of starting duty are as follows: (a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off. (b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operations per 10 minutes and all wye-delta and two-step autotransformer starting motors. (c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging. 3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers. 4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following: (a) They are adjustable. (b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor. (c) The combination is especially identified for use. (d) It is installed per any instructions included in its listing or labeling. (e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-load current. 5 Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the starting Page 70 of 176

71 5 of 164 4/22/2016 1:06 PM current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes. Exception: Table shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70 shall be observed for Design B energy efficient motor circuits A listed self-protected combination controller shall be permitted in lieu of the devices specified in Table for branch circuit and overload protection of a single motor circuit Where a listed self-protected combination controller has an adjustable, instantaneous trip setting, the setting shall not exceed 1300 percent of full-load motor current for other than Design B energy efficient motors and not more than 1700 percent of full-load motor current for Design B energy efficient motors Several motors, each not exceeding 1 hp in rating, shall be permitted on a nominal 120-volt branch circuit protected at not over 20 amperes or a 600-volt nominal or less branch circuit, protected at not over 15 amperes, where all of the following conditions are met: (1) The full-load rating of each motor does not exceed 6 amperes. (2) The rating of the branch-circuit short-circuit and ground-fault protective device marked on any of the controllers is not exceeded. The short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or single set of fuses. (3) Individual overload protection conforms to Section Where the branch-circuit short-circuit and ground-fault protective device is selected not to exceed that allowed by for the smallest rated motor, two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where it can be determined that the branch-circuit short-circuit and ground-fault protective device will not open under severe normal conditions of service that might be encountered. The short-circuit and ground-fault protection shall be provided by a single inverse time circuit breaker or single set of fuses. Page 71 of 176

72 6 of 164 4/22/2016 1:06 PM Two or more motors or one or more motor(s) and other load(s), and their control equipment shall be permitted to be connected to a single branch circuit where short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or a single set of fuses, provided the following conditions under (1) and either (2) or (3) are met: (1) Each motor controller and overload device is either listed for group installation with specified maximum branch-circuit protection or selected such that the ampere rating of the motor branch shortcircuit and ground-fault protective device does not exceed that permitted by for that individual motor controller or overload device and corresponding motor load. (2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceed the values in Table for the smallest conductor in the circuit. (3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the value specified in for the highest rated motor connected to the branch circuit plus an amount equal to the sum of the full-load current ratings of all other motors and the ratings of other loads connected to the circuit. Where this calculation results in a rating less than the ampacity of the branch circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit breaker to a value not exceeding that permitted by Sections 12.5 and Overcurrent protection for loads other than motor loads shall be in accordance with 7.2.3, 7.2.4, and Where 16 AWG or 18 AWG conductors are used for branch circuit conductors or tap conductors under , the rating and type of the branch short-circuit and ground-fault protection shall be in accordance with Table Relationship Between Conductor Size and Maximum Rating or Setting of Short-Circuit Protective Device for Power Circuits Group Installations Conductor Size (AWG) Maximum Rating Fuse or Inverse Time* Circuit Breaker (amperes) 18 See footnote. 16 See footnote / / /0 800 * Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and 18 AWG shall be determined in accordance with Page 72 of 176

73 7 of 164 4/22/2016 1:06 PM For group installations described in (3), the conductors of any tap supplying a single motor shall not be required to have an individual branch-circuit short-circuit and ground-fault protective device, provided they comply with one of the following: (1) No conductor to the motor shall have an ampacity less than that of the branch-circuit conductors. (2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuit conductors, with a minimum in accordance with Sections 12.5 and 12.6, the conductors to the motor overload device being not more than 7.5 m (25 ft) long and being suitably protected from physical damage in accordance with Chapter 13. (3) Conductors from the branch-circuit short-circuit and ground-fault protective device to a listed manual motor controller additionally marked Suitable for Tap Conductor Protection in Group Installations or to a branch circuit protective device shall be permitted to have an ampacity not less than 1/10 the rating or setting of the branch-circuit short-circuit and ground-fault protective device. The conductors from the controller to the motor shall have an ampacity in accordance with Sections 12.5 and The conductors from the branch-circuit short-circuit and ground-fault protective device to the controller shall (1) be enclosed either by an enclosed controller or by a raceway and be not more than 3 m (10 ft) long or (2) have an ampacity not less than that of the branch-circuit conductors. Additional Proposed Changes File Name PC_44.pdf Description Approved PC 44 Held Note: This Public Input originated as Public Comment No. 18 and was reported at as "Reject but Hold" in the F2014 Second Draft Report for NFPA 79, per the Regs at Submitter's Substantiation: Transformers and overload device requirements are provided with references to the NEC. A similar requirement should be included for motor controllers. Submitter Full Name: TC on EEI-AAA Organization: NFPA Submittal Date: Tue Dec 15 10:21:09 EST 2015 Resolution: Requirements for sizing motor controllers would be more appropriate for Chapter 14. Page 73 of 176

74 8/27/13 TerraView Public Comment No. 43-NFPA [ Section No ] A supply circuit disconnecting means shall be provided for the following: (1) Each incoming supply circuit to a machine (2) The supply circuit to a feeder system using collector wires, collector bars, slip-ring assemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines (3) Each on-board power source (e.g., generators, uninterruptible power supplies) Exception: Communication and remote control and signaling circuits of less than 50 volts shall not be required to be provided with a supply circuit disconnecting means * Each disconnecting means required by shall be legibly marked to indicate the equipment it disconnects Where a machine is supplied by more than one supply circuit, a marking shall be installed at each supply circuit disconnect location denoting the location of all other supply circuit disconnects. Additional Proposed Changes File Name NFPA79sect5311.docx Description Approved Cover Sheet Statement of Problem and Substantiation for Public Comment Section includes "electronic circuits" in the description. It is not necessary or practical to include a disconnecting means for these limited energy circuits. This comment is submitted based on the committee statement on PI 81. Submitter Full Name: Paul Dobrowsky Organization: Submittal Date: Wed May 08 11:38:34 EDT 2013 Committee Action: Accepted Resolution: SR-7-NFPA Statement: It is not necessary or practical to include a disconnecting means for limited energy circuits. This comment is submitted based on the committee statement on PI 81. See Article 725 and 800 in the NEC for an explanation of remote control and communication circuits respectively. Copyright Assignment I, Paul Dobrow sky, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright assignment. By checking this box I affirm that I am Paul Dobrow sky, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature Public Comment No. 44-NFPA [ Section No ] Rating and Setting of Overcurrent Protective Devices. Motor controllers shall be provided in accordance with Article 430, Part VII of NFPA * Page 74 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 34/41

75 8/27/13 TerraView Each motor controller and its associated wiring shall be protected as an individual branch circuit by a short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table Table Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller Fuse Class with Non Time Delay Full-Load Current (%) AC-2 AC-3 AC-4 R J CC T Type 2 of Application Fuse Class with Time Delay 1 AC-2 AC-3 AC-4 RK RK J CC Instantaneous trip circuit breaker Inverse trip circuit breaker Note: Where the values determined by Table do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possible setting shall be permitted. 1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non time-delay Class CC, J, or T fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current. 2 Types of starting duty are as follows:?(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.?(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operations per 10 minutes and all wye-delta and two-step autotransformer starting motors.?(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging. 3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers. 4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following:?(a) They are adjustable.?(b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor.?(c) The combination is especially identified for use.?(d) It is installed per any instructions included in its listing or labeling.?(e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-load current. 5 Where the rating of an inverse time circuit breaker specified in Table is not sufficient for the starting current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes. Exception : Table shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70, shall be observed for Design B energy efficient motor circuits A listed self-protected combination controller shall be permitted in lieu of the devices specified in Table for branch circuit and overload protection of a single motor circuit Where a listed self-protected combination controller has an adjustable, instantaneous trip setting, the setting shall not exceed 1300 percent of full-load motor current for other than Design B energy efficient motors and not more than 1700 percent of full-load motor current for Design B energy efficient motors Several motors, each not exceeding 1 hp in rating, shall be permitted on a nominal 120-volt branch circuit protected at not over 20 amperes or a 600-volt nominal or less branch circuit, protected at not over 15 amperes, where all of the following conditions are met: (1) The full-load rating of each motor does not exceed 6 amperes. (2) The rating of the branch-circuit short-circuit and ground-fault protective device marked on any of the controllers is not exceeded. The short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or single set of fuses. (3) Individual overload protection conforms to Section 7.3. Page 75 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 35/41

76 8/27/13 TerraView Where the branch-circuit short-circuit and ground-fault protective device is selected not to exceed that allowed by for the smallest rated motor, two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where it can be determined that the branch-circuit short-circuit and ground-fault protective device will not open under severe normal conditions of service that might be encountered. The short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or single set of fuses Two or more motors or one or more motor(s) and other load(s), and their control equipment shall be permitted to be connected to a single branch circuit where short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or a single set of fuses, provided the following conditions under (1) and either (2) or (3) are met: (1) Each motor controller and overload device is either listed for group installation with specified maximum branch-circuit protection or selected such that the ampere rating of the motor branch short-circuit and ground-fault protective device does not exceed that permitted by for that individual motor controller or overload device and corresponding motor load. (2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceed the values in Table for the smallest conductor in the circuit. (3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the value specified in for the highest rated motor connected to the branch circuit plus an amount equal to the sum of the full-load current ratings of all other motors and the ratings of other loads connected to the circuit. Where this calculation results in a rating less than the ampacity of the branch circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit breaker to a value not exceeding that permitted by Sections 12.5 and Overcurrent protection for loads other than motor loads shall be in accordance with 7.2.3, 7.2.4, and Where 16 AWG or 18 AWG conductors are used for branch circuit conductors or tap conductors under , the rating and type of the branch short-circuit and groundfault protection shall be in accordance with Table Relationship Between Conductor Size and Maximum Rating or Setting of Short-Circuit Protective Device for Power Circuits Group Installations Conductor Size Maximum Rating Fuse or Inverse Time* (AWG) Circuit Breaker (amperes) 18 See footnote. 16 See footnote / / /0 800 * Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and 18 AWG shall be determined in accordance with For group installations described in (3), the conductors of any tap supplying a single motor shall not be required to have an individual branchcircuit short-circuit and ground-fault protective device, provided they comply with one of the following: (1) No conductor to the motor shall have an ampacity less than that of the branch-circuit conductors. (2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuit conductors, with a minimum in accordance with Sections 12.5 and 12.6, the conductors to the motor overload device being not more than 7.5 m (25 ft) long and being suitably protected from physical damage in accordance with Chapter 13. (3) Conductors from the branch-circuit short-circuit and ground-fault protective device to a listed manual motor controller additionally marked Suitable for Tap Conductor Protection in Group Installations or to a branch circuit protective device shall be permitted to have an ampacity not less than 1/10 the rating or setting of the branch-circuit short-circuit and ground-fault protective device. The conductors from the controller to the motor shall have an ampacity in accordance with Sections 12.5 and The conductors from the branch-circuit short-circuit and ground-fault protective device to the controller shall (1) be enclosed either by an enclosed controller or by a raceway and be not more than 3 m (10 ft) long or (2) have an ampacity not less than that of the branch-circuit conductors. Additional Proposed Changes File Name NFPA79sect7210.docx Description Approved Cover Sheet Statement of Problem and Substantiation for Public Comment Transformers and overload device requirements are provided with references to the NEC. A similar requirement should be included for motor controllers. Page 76 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 36/41

77 8/27/13 TerraView Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed May 08 12:24:26 EDT 2013 Committee Action: Resolution: Rejected but held There was no link to a PI. The submitter linked the comment to FR-103 which was related to transformers and overload devices. This comment is related to motor controllers and therefore is considered new material. Copyright Assignment I, Paul Dobrow sky, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright assignment. By checking this box I affirm that I am Paul Dobrow sky, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature Public Comment No. 45-NFPA [ Section No ] * Duct. An enclosed channel designed expressly for holding and protecting electrical conductors, cables, and busbars. Additional Proposed Changes File Name NFPA79sectA3332.docx Description Approved Cover Sheet Statement of Problem and Substantiation for Public Comment The term "Raceway" is defined and is the correct term. Adding information in the proposed annex related to the term "duct" is appropriate. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Thu May 09 10:08:13 EDT 2013 Committee Action: Resolution: Rejected FR-95, The concept has merit; however, the submitter does not address all instances of use of duct especially when not in a parenthetical reference in the standard. Copyright Assignment I, Paul Dobrow sky, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright assignment. By checking this box I affirm that I am Paul Dobrow sky, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature Page 77 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 37/41

78 8 of 164 4/22/2016 1:06 PM Public Input No. 164-NFPA [ Section No [Excluding any Sub-Sections] ] Page 78 of 176

79 9 of 164 4/22/2016 1:06 PM Each motor controller and its associated wiring shall be protected as an individual branch circuit by a shortcircuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of the designated SCPD shall be as shown in Table Table Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and Motor Controller Fuse Class with Non Time Delay Full-Load Current (%) AC-2 AC-3 AC-4 R CF or J CC T Type of Application 2 Fuse Class with Time Delay 1 AC-2 AC-3 AC-4 RK RK CF or J CC Instantaneous trip circuit breaker Inverse trip circuit breaker Note: Where the values determined by this table do not correspond to the standard sizes or ratings, the next higher standard size, rating, or possible setting shall be permitted. 1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed 225 percent. The rating of a time-delay Class CC fuse and non time-delay Class CC, J, CF, or T fuse shall be permitted to be increased but shall in no case exceed 400 percent of the full-load current. 2 Types of starting duty are as follows: (a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off. (b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10 operations per 10 minutes and all wye-delta and two-step autotransformer starting motors. (c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching, jogging. 3 Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with NEMA-rated motor controllers. 4 Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the following: (a) They are adjustable. (b) Part of a combination controller has motor-running protection and also short-circuit and ground-fault protection in each conductor. (c) The combination is especially identified for use. (d) It is installed per any instructions included in its listing or labeling. (e) They are limited to single motor applications, circuit breakers with adjustable trip settings shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of the motor full-load current. 5 Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the starting current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load Page 79 of 176

80 0 of 164 4/22/2016 1:06 PM currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes. Exception No. 1 : Table shall not apply to Design B energy efficient motor circuits. The provisions of NFPA 70 shall be observed for Design B energy efficient motor circuits. Exception No. 2 Where the controller is a drive marked Suitable for Output Conductor Protection, the maximum rating of the designated SCPD shall be determined by replacing the full-load current in Table with the drive s rated input current. Drive technology is capable of providing output conductor short-circuit and ground-fault protection. There is a UL task group developing requirements to investigate and mark a drive for protecting its output conductors in individual-motor and group installations. This change permits the use of such a drive to decouple the output conductor sizing from the branch circuit protective device sizing. This proposal is related to the proposed change to (2). Related Public Inputs for This Document Related Input Public Input No. 163-NFPA [Section No ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 13:53:09 EST 2016 Resolution: FR-65-NFPA Statement: Drive technology is capable of providing output conductor short-circuit and ground-fault protection. There is a UL task group developing requirements to investigate and mark a drive for protecting its output conductors in individual-motor and group installations. This change permits the use of such a drive to decouple the output conductor sizing from the branch circuit protective device sizing. This proposal is related to the proposed change to (2). Page 80 of 176

81 1 of 164 4/22/2016 1:06 PM Public Input No. 163-NFPA [ Section No ] Page 81 of 176

82 2 of 164 4/22/2016 1:06 PM Two or more motors or one or more motor(s) and other load(s), and their control equipment shall be permitted to be connected to a single branch circuit where short-circuit and ground-fault protection is provided by a single inverse time circuit breaker or a single set of fuses, provided the following conditions under (1) and either (2) or (3) are met: (1) Each motor controller and overload device is either listed for group installation with specified maximum branch-circuit protection or selected such that the ampere rating of the motor branch shortcircuit and ground-fault protective device does not exceed that permitted by for that individual motor controller or overload device and corresponding motor load. (2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceed the values in Table for the smallest conductor in the circuit. Exception: Where a controller is a drive marked Suitable for Output Conductor Protection, the conductors from the drive to the motor shall not apply to determining the smallest conductor in the circuit. The conductors from the drive to the motor shall have an ampacity in accordance with Sections 12.5 and (3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the value specified in for the highest rated motor connected to the branch circuit plus an amount equal to the sum of the full-load current ratings of all other motors and the ratings of other loads connected to the circuit. Where this calculation results in a rating less than the ampacity of the branch circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit breaker to a value not exceeding that permitted by Sections 12.5 and Overcurrent protection for loads other than motor loads shall be in accordance with 7.2.3, 7.2.4, and Where 16 AWG or 18 AWG conductors are used for branch circuit conductors or tap conductors under , the rating and type of the branch short-circuit and ground-fault protection shall be in accordance with Table Relationship Between Conductor Size and Maximum Rating or Setting of Short-Circuit Protective Device for Power Circuits Group Installations Conductor Size (AWG) Maximum Rating Fuse or Inverse Time* Circuit Breaker (amperes) 18 See footnote. 16 See footnote / / /0 800 * Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and 18 AWG shall be determined in accordance with Page 82 of 176

83 3 of 164 4/22/2016 1:06 PM Drive technology is capable of providing output conductor short-circuit and ground-fault protection. There is a UL task group developing requirements to investigate and mark a drive for protecting its output conductors in individual-motor and group installations. This change permits the use of such a drive to decouple the output conductor sizing from the branch circuit protective device sizing. This proposal is related to the proposed change to Related Public Inputs for This Document Related Input Public Input No. 164-NFPA [Section No [Excluding any Sub-Sections]] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 13:50:47 EST 2016 Resolution: FR-60-NFPA Statement: The listing requirement was added to ensure products were evaluated to the product standard. The text was reformatted for clarity. Page 83 of 176

84 4 of 164 4/22/2016 1:06 PM Public Input No. 158-NFPA [ Section No ] For group installations described in (3), the conductors of any tap supplying a single motor shall not be required to have an individual branch-circuit short-circuit and ground-fault protective device, provided they comply with one of the following: (1) No conductor to the motor shall have an ampacity less than that of the branch-circuit conductors. (2) No conductor to the motor shall have an ampacity less than one-third that of the branch-circuit conductors, with a minimum in accordance with Sections 12.5 and 12.6, the conductors to the motor overload device being not more than 7.5 m (25 ft) long and being suitably protected from physical damage in accordance with Chapter 13. (3) Conductors from the point of the tap from the branch - circuit short-circuit and ground-fault protective device to a listed manual motor controller additionally marked Suitable for Tap Conductor Protection in Group Installations or to a branch circuit protective device shall be permitted to have an ampacity not less than 1/10 the rating or setting of the branch-circuit short-circuit and ground-fault protective device. The conductors from the controller to the motor shall have an ampacity in accordance with Sections 12.5 and The conductors from the branch-circuit short-circuit and ground-fault protective device point of the tap to the controller shall (1) be enclosed either by an enclosed controller or by a raceway and be not more than 3 m (10 ft) long or (2) have an ampacity not less than that of the branch-circuit conductors. These changes are Intended to correlate with the NEC s (D)(3). The third sentence s change makes it consistent with the NEC s (D)(3). The first sentence s change makes the first sentence consistent with the third and is the same as an accepted change to the 2017 NEC. Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 07:31:07 EST 2016 Resolution: It will be improper to make changes based on 2017 edition of the NEC as it has not been approved by SC for issue and use. NFPA 79 FD should reflect consistency with the published NEC. This can be resubmitted and considered during the comments period if NEC 2017 is issued and contains the suggested changes. Page 84 of 176

85 5 of 164 4/22/2016 1:06 PM Public Input No. 127-NFPA [ Chapter 8 [Title Only] ] Grounding and Bonding The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The title would match that used in the NEC for Article 250. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Tue Jan 05 20:22:19 EST 2016 Resolution: FR-27-NFPA Statement: The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The title would match that used in the NEC for Article 250. Page 85 of 176

86 6 of 164 4/22/2016 1:06 PM Public Input No. 141-NFPA [ Section No. 8.2 ] 8.2 Equipment Grounding Circuit Conductors and Bonding Jumpers Grounding Circuit Parts. The equipment grounding circuit shall consist of the following: Equipment grounding conductor terminal(s) Equipment grounding conductors and equipment bonding jumpers machine and all exposed, non-currentcarrying conductive parts, material, and equipment likely to be energized shall be connected to an equpment grounding conductor or bonding jumper. Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energized shall not be required to be connected to an equpment grounding conductor or bonding jumper Grounding Circuit Stress. Effective Ground Fault Current Path All parts of the equipment grounding circuit effective ground fault current path shall be capable of withstanding the highest thermal and mechanical stress that can be caused by fault currents flowing in that part of the circuit. All exposed conductive parts of the electrical equipment and the machine(s) shall be connected to the equipment grounding circuit. Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energized shall not be required to be grounded Equipment Grounding and Bonding. The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to be energized shall be effectively grounded connected in a manner that provides an effective ground fault current path. Where electrical devices are mounted on metal mounting panels that are located within nonmetallic enclosures, the metal mounting panels shall be effectively grounded connected to an equipment grounding conductor or bonding jumper. Where specified by the manufacturer, components and subassemblies shall be bonded to the equipment grounding circuit in accordance with the manufacturer s instructions * Equipment Grounding Conductor Terminal For each incoming supply circuit, an equipment grounding conductor terminal shall be provided in the vicinity of the associated phase conductor terminals All of the items in shall be interconnected to the equipment grounding conductor terminal.??? The equipment grounding conductor terminal shall accommodate an equipment grounding conductor sized in accordance with Table Page 86 of 176

87 7 of 164 4/22/2016 1:06 PM * The equipment grounding conductor terminal shall be identified with the word GROUND, the letters GND or GRD, the letter G, the color GREEN, or the symbol in Figure In addition to the required marking, the letters PE shall also be permitted to identify this terminal. Figure Grounding Symbol Where an auxiliary grounding electrode is specified, the terminal shall accommodate this additional grounding electrode conductor Equipment Grounding Conductors and Bonding Jumpers. Equipment grounding conductors and bonding jumpers shall be identified in accordance with Conductors used for grounding and bonding purposes shall be copper. Stipulations on stranding and flexing as outlined in Chapter 12 shall apply Equipment grounding conductors and bonding jumpers shall be insulated, covered, or bare and shall be protected against physical damage. Page 87 of 176

88 8 of 164 4/22/2016 1:06 PM Equipment grounding conductors and bonding jumpers of the wire type shall not be smaller than shown in Table , but shall not be required to be larger than the circuit conductors supplying the equipment. Table Minimum Size of Equipment Grounding Conductors and Bonding Jumpers Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of the Equipment (Not Exceeding Amperes) Continuity of the Equipment Grounding Circuit Copper Conductor Size (AWG or kcmil) / / / / The continuity Continuity of the equipment grounding circuit conductors and bonding jumpers shall be ensured by effective connections through conductors Removing a wiring device shall not interrupt the continuity of the equipment grounding circuit Bonding of equipment with bolts or other identified means shall be permitted if paint and dirt are removed from the joint surfaces or the bonded members are effectively penetrated Raceways, wireways, and cable trays shall not be used as equipment grounding or bonding conductors Doors or Covers Where electrical devices are mounted on conductive doors or covers, an equipment bonding jumper shall be installed. Page 88 of 176

89 9 of 164 4/22/2016 1:06 PM Where required, an equipment bonding jumper shall connect the conductive door or cover to the equipment enclosure or to an equipment grounding terminal within the enclosure Portable, pendant, and resilient-mounted equipment shall be bonded by separate conductors. Where multiconductor cable is used, the bonding conductor shall be included as one conductor of the cable * Exclusion of Switching Devices. The equipment grounding circuit shall not contain any switches or overcurrent protective devices. Separable connections such as those provided in drawout equipment or attachment plugs and mating connectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor. First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, and connectors preclude energization without grounding continuity Equipment Grounding Conductor Connecting Points All equipment grounding conductors shall be terminated in accordance with The equipment grounding conductor connecting points shall have no other function * The equipment grounding conductor connecting points, other than the equipment grounding terminal, shall be identified by the color GREEN, by the bicolor combination of GREEN-AND-YELLOW, or by use of the symbol shown in Figure Terms used in NFPA 79 need to be the same as those in the NEC unless there is a good reason for them to be different. The term "equipment grounding circuit" was created during the development of NFPA This was based on the concept of using an industrial machine frame, instead of installing separate equipment grounding conductors or equipment bonding jumpers, to each equipment needing an effective ground fault current path. The industrial machine frame is not permitted to be used this way anymore so this term is not relevant or useful and is creating confusion. The word "wiring" was added before "device" in to help differentiate between products such as terminals that are devices. Additional improvements can be made after the committee agrees with this change. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 13:47:59 EST 2016 Resolution: FR-29-NFPA Statement: Grounding and bonding terms are revised to harmonize with those used in the NEC. The term "equipment grounding circuit" was created during the development of NFPA 79, 2002, but is not used in Article 250 of NFPA 70. This was based on the concept of using an industrial machine frame, instead of installing separate equipment grounding conductors or equipment bonding jumpers to equipment needing an effective ground fault current path. The industrial machine frame is not permitted to be used this way so this term is not relevant or useful and is creating confusion as the term circuit typically is associated with current-carrying conductors. Page 89 of 176

90 0 of 164 4/22/2016 1:06 PM Editorial changes are incorporated for clarity and usability. The term "incoming" was removed in front of the term "supply" to correlate with other resolutions taken by the committee in Ch 5. Page 90 of 176

91 1 of 164 4/22/2016 1:06 PM Public Input No. 175-NFPA [ Section No ] The source of supply for all control circuits shall be taken from the load side of the supply disconnecting means. Exception: The power supply circuit to memory elements and their support logic requiring power at all times such as PLC s, safety PLC s, Ethernet switches and HMI s, inputs, non mo on outputs such as indicator lights and stack lights, and displays to maintain the storage of information shall be permitted to be taken from the line side of the supply disconnecting means or other power source. At present PLC s, ethernet switches and HMI s are assumed be covered by the existing exception. It is vital that these remain on to prevent loss of communications and data. Additionally, if power is cut it may be difficult to restart the system. For instance, if you push start and nothing happens because there is no power to the start circuit. With regards to inputs, disconnecting the power on inputs in some cases will cause a rash of software error messages. Many customers are reluctant to allow the powering of inputs above the disconnect because of the exception does not mention it. Keeping inputs powered does not present a hazard. Non-motion outputs and displays are usually some type of indicator and as such there is no reason to require disconnection of power to these circuits. All motion power would be disconnected by the disconnect as usual. If anything in the above the main disconnect needs to be worked on the lighting disconnect would be locked out. (safety PLC with inputs and non motion outputs). Related Public Inputs for This Document Related Input Public Input No. 187-NFPA [Section No. 5.3] Relationship Submitter Full Name: Daniel Neeser Organization: Eaton s Bussmann Division Submittal Date: Thu Jan 07 15:20:26 EST 2016 Resolution: FR-59-NFPA Statement: The revised text identifies the circuits as excepted circuits and refers users to the appropriate sections for devices. Individual terms identified in the public input to be added would be covered in (4) as items that are required to be energized for satisfactory operation. Page 91 of 176

92 2 of 164 4/22/2016 1:06 PM Public Input No. 168-NFPA [ New Section after ] TITLE OF NEW CONTENT Cycle Stop (Top Stop) Type your content here...a means to cease an automatic operation at the predesignated normal stopping position. Further automatic cycling requires manual re-starting or enabling by the Operator. The cycle stop manual control shall shall comply with Cycle stop is a Catagory 2 stop. Many individuals, especially foreign, consider all stops to be red color device, be it for a motor stop push button or other stop function. Yellow is mentioned in as alternate action, and for abnormal conditions. ANSI B (and prior) specifies the color yellow for the cycle stop control. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 14:47:31 EST 2016 Resolution: The substantiation provided does not address the rationale for the change proposed. Page 92 of 176

93 3 of 164 4/22/2016 1:06 PM Public Input No. 170-NFPA [ New Section after ] TITLE OF NEW CONTENT "Stop" by De-energization. Type your content here... Stop functions shall be initiated by de-energization, not energization of a device or as a command to a controller (plc). Exception: Does not apply to Cycle stop commands. Lost the requirement for de-energization to cause a "stop" to occur over the past editions. Exception would be for the cycle stop or Top Stop command to cease automatic process operation. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 15:03:58 EST 2016 Resolution: FR-47-NFPA Statement: The requirement for de-energization to cause a "stop" to occur was lost over the past editions. An Exception was added that would be for the "Cycle Stop" or "Top Stop" command to cease automatic process operation without de-energization. Original language was rewritten for clarity based on editorial comments. Page 93 of 176

94 4 of 164 4/22/2016 1:06 PM Public Input No. 138-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here Wireless devices shall be permitted to be used to initiate emergency stop functions. Applications are available that include control functions for electric equipment. The standard needs to be clear whether or not these devices are permitted. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 12:44:38 EST 2016 Resolution: provides the necessary requirements for emergency stops used on cableless control stations. The recommended text for initiating wireless emergency stop does not include requirements to satisfy the safety of the Emergency stop function. Page 94 of 176

95 5 of 164 4/22/2016 1:06 PM Public Input No. 139-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here Wireless devices shall not be permitted to be used to initiate emergency stop functions. Applications are available that include control functions for electric equipment. The standard needs to be clear whether or not these devices are permitted. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 12:57:15 EST 2016 Resolution: provides the necessary requirements for emergency stops used on cableless control stations. The recommended text for initiating wireless emergency stop does not include requirements to satisfy the safety of the Emergency stop function. Page 95 of 176

96 6 of 164 4/22/2016 1:06 PM Public Input No. 122-NFPA [ Section No ] Use of More Than One Operator Control Station Master Operator Control Station Where a machine has more than one operator control station, measures shall be taken to ensure that only one control station shall be enabled at a given time. Indication of which operator control station is in control of the machine shall be provided at locations where necessary for the safety requirements of the machine. Exception: A stop command from any one of the control stations shall be effective where necessary for the safety requirements of the machine Multiple Concurrent Operator Stations Where a machine has more than one operator two hand control stations being used as a safeguarding device, each operator shall have an operator station that requires concurrent operation of the run controls. Allowing the use of multiple operator control stations as required by 29CFR (c)(3))vii)(a) and ANSI B (5) (c)(3)(vii)(a) When used in press operations requiring more than one operator, separate two hand controls shall be provided for each operator, and shall be designed to require concurrent application of all operators' controls to activate the slide. The removal of a hand from any control button shall cause the slide to stop. AMERICAN NATIONAL STANDARD B ) If more than one operator is to be safeguarded by the use of two-hand controls, each operator shall have an individual set of operator hand controls. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 16:10:18 EST 2016 Resolution: Section already has the same requirement. Page 96 of 176

97 7 of 164 4/22/2016 1:06 PM Public Input No. 102-NFPA [ Section No ] Arrangement of Operator Interface Devices. All start pushbuttons shall be mounted above or to the left of their associated stop pushbuttons. Exception No. 1: Start pushbuttons in series, such as operating pushbuttons on punch presses. Exception No. 2: Wobble-stick or rod-operated emergency stop pushbuttons mounted in the bottom of pendant stations. Emergency stop devices installed in accordance with Emergency stop devices are uniquely identifiable and have location and mounting requirements already given in As emergency stop devices can be associated with more than one start button, the requirement to locate the start buttons relative to an emergency stop device is confusing. The proposed text expands the exception for wobble stick emergency stop devices to include all emergency stop devices. Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 09:57:06 EST 2016 Resolution: FR-48-NFPA Statement: Emergency stop devices are uniquely identifiable and have location and mounting requirements already given in As emergency stop devices can be associated with more than one start button, the requirement to locate the start buttons relative to an emergency stop device is confusing. Page 97 of 176

98 8 of 164 4/22/2016 1:06 PM Public Input No. 173-NFPA [ New Section after 11.1 ] TITLE OF NEW CONTENT Control Devices external to the control enclosure Type your content here... Control devices external to the control enclosure such as but not limited to pushbuttons, indicator lights, pressure switches, electronic measureing device connections (pressure transducers, position sensors, etc.), solenoids, and limit switches shall be protected from the ingress of foreign debris or liquid, for the operating environment exposure that is expected to be operated in. Exception: Unless supported by an analysis or other assessment activity, an oil tight, NEMA12, rated device(s) shall be used. Requirements for enclosures is given, including the degrees of protection, but the control devices are not being addressed. Suggestion is similar to JIC EGP-1-67 requirement at E6.1.4 for the use of oil-tight devices external to the control enclosure. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 15:13:57 EST 2016 Resolution: This is currently covered adequately in New content not needed. Additionally, the proposed exception appears to mandate the use of only NEMA12 rated devices for everything that doesn t come with a supporting analysis/assessment. Page 98 of 176

99 9 of 164 4/22/2016 1:06 PM Public Input No. 86-NFPA [ Section No ] All items of control equipment which may require inspection, adjustment, or replacment shall be placed and oriented so that they can be identified without moving them or the wiring. Where practicable, with items that require checking or adjustment for correct operation or that are liable to need replacement, those actions shall be possible without dismantling other equipment or parts of the machine (except opening doors or removing covers). Terminals not associated with when the door(s) or cover(s) is opened or removed, the items can be identified and accessed without moving, removing, or the dismantling of any wiring or other items or components of the machine. Terminals for other than control equipment shall also conform to these requirements. These requirements shall not apply to modules or subassemblies which are disposable, permanently sealed, and cannot be opened. Certain Japanese machine makers have begun to "miniaturize" control / power panels, and use modules assembled together as "Control Panels", etc. These "Component" boxes, although presented as being disposable, and not intended to be worked on in the field or on the floor, are super crowded, with components stacked upon other components. If permitted in the field these "boxes" would be a safety hazard and difficult to work on. Permitting these modules or subassemblies etc., ONLY when they are PERMANENTLY sealed and cannot be opened, and therefore TRULY disposable or rebuilt only by the machine maker / supplier - prevents this potential hazard. Submitter Full Name: Earl Sowders Organization: Toyota Engineering Submittal Date: Wed Dec 16 09:04:33 EST 2015 Resolution: FR-32-NFPA Statement: An exception has been added to parts of the machine that cannot be serviced. Broke out paragraph with several requirements into subsections for usability and clarity based on editorial comments Page 99 of 176

100 0 of 164 4/22/2016 1:06 PM Public Input No. 183-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here... Busbars shall be protected from physical damage and be held firmly in place. Spacings between busbar terminals and other bare metal parts shall not be less than specified in Table (D). Many control panel builders will shop construct busbar terminations and in multi-phase systems these are typically adjacent to each other. Many times they will disregard the needed separation distance not only between the busbars but also between individual busbars and any grounded surfaces. Additionaly they will overlook the needed separation distances as it is compromised by the fastening hardware or terminal lugs used to secure and terminate conductors to the busbars. NEC Article and specifically Table (D) provides guidance on these needed distances. These separation or clearance requirements can also be found in Article and in UL 508A. Provide this new language into NFPA 79 aid in pointing the user to these requirements. Submitter Full Name: Barry Boggs Organization: Affilliation: Toyota Motor Engineering & Man Toyota Submittal Date: Thu Jan 07 16:16:44 EST 2016 Resolution: FR-33-NFPA Statement: Table (D) of NFPA 70 provides specific requirements for busbar spacings. These separation or clearance requirements can also be found in Section and in UL 508A. Providing this new language into NFPA 79 aids in pointing the user to these requirements. Page 100 of 176

101 1 of 164 4/22/2016 1:06 PM Public Input No. 129-NFPA [ Section No ] Machine compartments containing control equipment shall be completely isolated from coolant and oil reservoirs. The compartment Compartments containing equipment that is required to be readily accessible such as branch circuit overcurrent devices shall be readily accessible and completely enclosed.the compartment shall not be considered enclosed where it is open to the floor, to the foundation upon which the machine rests, or to other compartments of the machine that are not clean and dry. Machine cabinets and compartments do not always need to be located where they are within easy reach of the floor or a platform. It can be desirable to locate some components that do not need frequent access, maintenance or servicing at higher locations. Not all equipment needs to be readily accessible from the floor. This can also help provide better access and workspace to the industrial machine and other equipment that does need more frequent access. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Tue Jan 05 20:50:52 EST 2016 Resolution: FR-34-NFPA Statement: Machine cabinets and compartments do not always need to be located where they are within easy reach of the floor or a platform. It can be desirable to locate some components that do not need frequent access, maintenance or servicing at higher locations. Not all equipment needs to be readily accessible from the floor. This can also help provide better access and workspace to the industrial machine and other equipment that does need more frequent access. Page 101 of 176

102 2 of 164 4/22/2016 1:06 PM Public Input No. 114-NFPA [ Section No ] A print pocket sized to accommodate physical electrical diagrams shall or software media shall be attached to the inside or outside of the door of the control enclosure or compartment. When this is not practicable, it shall be permissible to place a pocket suitable for the environment outside the door of the control enclosure or compartment in a well-identified location. Single-door and multi-door enclosures shall have at least one print pocket. As technology progresses many products are not provided with paper schematics or working diagrams. In many cases, CD's are provided and manufactures have envelopes for this purpose and do not have large print pockets. This will allow an option without causing a discrepancy.. Submitter Full Name: Richard Trainor Organization: TUV SUD America Inc. Submittal Date: Tue Jan 05 11:54:27 EST 2016 Resolution: FR-35-NFPA Statement: This action takes into account the changing technology being used to provide documentation of the provided machinery. Broke out the single paragraph with several requirements into subsections for usability and clarity. Page 102 of 176

103 3 of 164 4/22/2016 1:06 PM Public Input No. 145-NFPA [ Section No ] * Conductors with higher insulation temperatures than specified for the termination(s) shall be permitted to be used for ampacity adjustment, correction, or both, provided the final tabulated ampacity does not exceed the lowest value of any termination. Exception: Ampacities of 90 C (194 F) insulated conductors or other special purpose conductors with higher temperature ratings can be determined in accordance with of NFPA 70. Table values are used to start with the answer resulting from applying factors are not tabular ampacities. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 15:18:25 EST 2016 Resolution: FR-49-NFPA Statement: The word tabulated is not the correct term and was removed. Page 103 of 176

104 4 of 164 4/22/2016 1:06 PM Public Input No. 126-NFPA [ New Section after ] TITLE OF NEW CONTENT Type your content here NEW Conductors supplying a single motor or multiple motors shall be permitted to be sized based on 125 percent of the highest rated motor at demand factors based on the loading or application of the motors. Motors such as servo applications are frequently used at a small portion of their full load rating. If many servo motors are on a machine without this provision the conductors used to supply those motors are or would be sized many times larger than what they need to be. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Tue Jan 05 20:02:53 EST 2016 Resolution: FR-55-NFPA Statement: Motors such as servo applications are frequently used at a small portion of their full load rating. If many servo motors are on a machine without this provision the conductors used to supply those motors are or would be sized many times larger than what they need to be. Page 104 of 176

105 5 of 164 4/22/2016 1:06 PM Public Input No. 146-NFPA [ Section No ] Where ampacity derating adjustment is required for more than three current-carrying conductors, the factor(s) shall be taken from Table (b). The term adjustment is the appropriate term to refer to a factor based on more than three current carrying conductors. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 15:22:14 EST 2016 Resolution: FR-56-NFPA Statement: The term adjustment is the appropriate term to refer to a factor based on more than three current carrying conductors. Page 105 of 176

106 6 of 164 4/22/2016 1:06 PM Public Input No. 116-NFPA [ Section No ] Appliance wiring material (AWM) shall be permitted under any of the following conditions: (1) Where part of an assembly that has been identified for the intended use (2) Where the AWM has been identified for use with approved equipment and is used in accordance with the equipment manufacturer s instructions (3) Where its construction meets all applicable requirements of Section 12.2 through Section 12.6 with modifications as follows: (4) Stranded conductors with wire sizes smaller than those listed in shall have a minimum of seven strands. Conductor insulation and cable jacket materials (a) Cable types not specified in shall have flame-resistant properties in compliance with applicable standards for intended use such as FT2 (horizontal wire) flame test or VW-1 (vertical wire) flame test (a) the applicable flame test in accordance with ANSI/ UL (a) UL For horizontal applications, the FT2 flame test is applicable. For vertical applications, the FV-1/Vertical Flame test is applicable. (b) Minimum insulation thicknesses for single-conductor AWM shall be as specified in Minimum insulation thickness for conductors that are part of a multiconductor jacketed AWM cable shall be as specified by the AWM style number and by the marked voltage rating of the cable. (c) AWM shall be marked in accordance with , , and The legend shall include manufacturer s name or trademark, AWM style number, voltage rating (unless marking is prohibited by ), wire gauge(s), temperature rating, and flame resistance. Additional markings for properties such as oil, water, UV, and chemical resistance identifiers shall be permitted where in compliance with applicable standards for intended use. Where markings alone are insufficient to identify for the intended application, suitable information shall be included with the machine technical documentation indicates cable types, not insulation and jacket materials. The revision makes this clarification. If the cable types are not provided determining the applicable flame rating is difficult. The minimum flame rating for the types in is either the Vertical Flame of the FT2 flame, depending on type. Therefore, these tests should be referenced. UL 1581 is UL s test reference standard. UL 2556 is the tri-national (US, Canada, Mexico) version of UL UL 1581 is being revised to move the methods to UL Rather than referencing one standard which then refers to another standard, having the direct reference is preferred. Submitter Full Name: Ronald Farr Page 106 of 176

107 7 of 164 4/22/2016 1:06 PM Organization: Ul Llc Submittal Date: Tue Jan 05 13:38:59 EST 2016 Resolution: addresses both conductors and cables and the AWM standard references the VW-1 flame test. The original text gives examples of acceptable tests rather than making it mandatory. Page 107 of 176

108 8 of 164 4/22/2016 1:06 PM Public Input No. 181-NFPA [ New Section after ] TITLE OF NEW CONTENT Conductor terminals identified on assemblies Type your content here... Terminals of built-up assemblies and sub-assemblies, being used to connect specific identified circuit conductors, shall be permanently marked to correspond with the identification shown on the electrical diagrams. Identification shall not be marked on removable covers or housings. With custom made, purpose specific, control equipment being used in control systems, terminals being used for interconnection with the remainder of the system need to permanently identified for maintenance and service. Lack of foresight to allow for proper marking has caused some assemblies to have such marking placed on removable covers that are subject to miss placement and loss. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 15:46:44 EST 2016 Resolution: The intent is covered in section of Page 108 of 176

109 9 of 164 4/22/2016 1:06 PM Public Input No. 182-NFPA [ New Section after ] TITLE OF NEW CONTENT Electrical connection to devices and motors. Type your content here... Electrical connections to devices, motors and devices with intergral leads (i.e.: solenoids) 4 AWG and smaller, shall be made with ring type pressure connectors. Connectors shall be bolted and taped. Soldered, insulation-piercing, and wire nut connectors shall not be used. Have found the use of insulation piercing splice connectors (as found at Home Depot) and wire nuts being used on inductive loads (motors) that have resulted in device and motor failures. The motor leads became loose likely due to machine vibration, causing the heating of the conductors to "melt" the wire nuts, then causing line to ground (the motor junction box/motor frame) to occur, and motor winding damage (single phased the polyphase motor). Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 15:54:23 EST 2016 Resolution: Connection requirements are covered in section of 13.1 ( , , ) of NFPA 79. Limiting it to ring type pressure connectors is too restrictive. Page 109 of 176

110 00 of 164 4/22/2016 1:06 PM Public Input No. 172-NFPA [ New Section after ] * Cable assemblies with factory-applied connectors and their associated wiring devices shall be permitted. Such connectors shall not be considered as splices or joints. Product standards and products are available for wiring system components suitable for industrial machinery including cable assemblies and associated wiring devices such as tees, panel-mounted fittings, field-wired fittings, and so forth. This clause clarifies the permitted use of these devices. Related Public Inputs for This Document Related Input Public Input No. 174-NFPA [New Section after A ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 15:12:51 EST 2016 Resolution: FR-36-NFPA Statement: Product standards and products are available for wiring system components suitable for industrial machinery including cable assemblies and associated wiring devices such as tees, panel-mounted fittings, field-wired fittings, and so forth. Annex material will be submitted. The new annex note provides a reference to two standards that address the cable assemblies and associated wiring devices that describes. Page 110 of 176

111 01 of 164 4/22/2016 1:06 PM Public Input No. 159-NFPA [ Section No ] * Exposed cables installed along the structure of the equipment or system or in the chases of the machinery shall be permitted. Exposed cables shall be installed to closely follow the surface and structural members of the machinery. This change is meant to correct an editing oversight. Remove asterisk. The asterisk was not moved during the 2012 Edition cycle when was renumbered to This change is associated with proposed changes to and A Related Public Inputs for This Document Related Input Public Input No. 165-NFPA [Section No ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 10:16:50 EST 2016 Resolution: FR-37-NFPA Statement: This FR is correcting an error in the last edition of the standard by removing an asterisk and adding it to Page 111 of 176

112 02 of 164 4/22/2016 1:06 PM Public Input No. 165-NFPA [ Section No ] * Manufactured assemblies with factory-applied molded connectors applied to cord shall be permitted. This change is meant to correct an editing oversight. Add asterisk to The asterisk was not moved during the 2012 Edition cycle when was renumbered to This change is associated with proposed changes to and A Related Public Inputs for This Document Related Input Public Input No. 159-NFPA [Section No ] Public Input No. 166-NFPA [Section No. A ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 14:08:57 EST 2016 Resolution: FR-37-NFPA Statement: This FR is correcting an error in the last edition of the standard by removing an asterisk and adding it to Page 112 of 176

113 03 of 164 4/22/2016 1:06 PM Public Input No. 154-NFPA [ New Section after ] TITLE OF NEW CONTENT Conductor Identification Type your content here x Each conductor shall have the same identification at all terminals and tie points. To avoid confusion by the use of sequential conductor numbering that causes a number change at a terminal or tie point. Non-industrial machine conductor numbering systems as found in "construction equipment." Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Wed Jan 06 16:27:21 EST 2016 Resolution: This proposed text is not necessary it is essential that the all conductor identification correspond with the technical documentation. This requirement is covered in Page 113 of 176

114 04 of 164 4/22/2016 1:06 PM Public Input No. 119-NFPA [ Section No ] Conductors shall be identified at each termination by number, letter, color (either solid or with one or more stripes), or a combination thereof and shall correspond with the technical documentation as defined in Chapter 17. Internal wiring on individual devices purchased completely wired shall not require additional identification. A green/yel conductor of a multiconductor cable was used as an ungrounded conductor but having the same identification number. Wire color use as identification (color green) in conflict with prohibition contained in Conflict between sections caused confusion in appropriate conductor use by a foreign equipment supplier. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 15:39:40 EST 2016 Resolution: Combinations of conductor identification are frequently used. Page 114 of 176

115 05 of 164 4/22/2016 1:06 PM Public Input No. 118-NFPA [ Section No ] * The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipment grounding conductor where insulated or covered. This color identification shall be strictly reserved for the equipment grounding conductor. Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is not required, the solid color GREEN shall be permitted for other than equipment grounding.exception No. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover is appropriately identified at all points of access. Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without one or more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on the control panel shall be permitted. Multiconductor cable (4 cond, red, white, black, green/yel) used to connect devices. Green/yel conductor had same identification sleeve of an ungrounded conductor. Maintenance service took disconnected cable conductor green/yel to ground, causing short circuit. Shock/fire hazard. Additional suggestion will be in conductor identification ( ) removing "or a combination thereof." Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 15:30:55 EST 2016 Resolution: FR-39-NFPA Statement: Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generally reserved for equipment grounding conductors and Exception No. 1 was too broad. The remaining exception provides the necessary flexibility from the main requirement. This ensures that the equipment grounding conductor if striped is predominantly green. Page 115 of 176

116 06 of 164 4/22/2016 1:06 PM Public Input No. 121-NFPA [ Section No ] * The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipment grounding conductor where insulated or covered. This color identification shall be strictly reserved for the equipment grounding conductor. Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is not required, the solid color GREEN shall be permitted for other than equipment grounding. Exception No. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover is appropriately identified at all points of access. Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without one or more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on the control panel shall be permitted. Transformer mounting hardware shall not be used for this purpose. Grounding connection would be dependent upon mounting hardware. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 15:56:56 EST 2016 Resolution: The intent is covered in Mounting hardware shall not be used for terminating conductors used for grounding and bonding. Page 116 of 176

117 07 of 164 4/22/2016 1:06 PM Public Input No. 190-NFPA [ Section No ] * The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipment grounding conductor where insulated or covered. This color identification shall be strictly reserved for the equipment grounding conductor. Green must be the majority color when used in combination with one or more yellow stripes. Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is not required, the solid color GREEN shall be permitted for other than equipment grounding. Exception No. 2: It shall be permitted to use conductors of other colors, provided the insulation or cover is appropriately identified at all points of access. Exception No. 3: For grounded control circuits, use of a GREEN insulated conductor with or without one or more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on the control panel shall be permitted. Conductors meeting the international standard for green and yellow combinations may have more yellow than green. Confusion exist by both the user, maintenance personnel and inspectors if this yellow conductor with one or more green stripes has some other purpose. Adding a requirement as to the requirement majority color (green) will address this problem. Submitter Full Name: Barry Boggs Organization: Toyota Motor Engineering & Man Affilliation: Toyota Submittal Date: Thu Jan 07 16:52:48 EST 2016 Resolution: FR-39-NFPA Statement: Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generally reserved for equipment grounding conductors and Exception No. 1 was too broad. The remaining exception provides the necessary flexibility from the main requirement. This ensures that the equipment grounding conductor if striped is predominantly green. Page 117 of 176

118 08 of 164 4/22/2016 1:06 PM Public Input No. 62-NFPA [ Section No ] The use of other colors for the following applications shall be as follows: (1) WHITE with BLUE stripe for grounded (current-carrying) dc circuit conductor (2) WHITE with ORANGE stripe for grounded (current-carrying) ac circuit conductor, which remains energized when the main supply circuit disconnecting means is in the off position (3) WHITE with ORANGE & BLUE stripe for grounded (current carrying) dc circuit conductor, which remains energized when the main supply circuit disconnecting means is in the off position (4) Whichever color stripe is selected, that color stripe shall be consistent with the ungrounded conductor of the excepted circuit described in Exception No. 1: Multiconductor cables shall be permitted to be permanently reidentified at the time of installation. Exception No. 2: Where the identification of machine power and control wiring is such that compliance with the mandatory color codes is too restrictive for specific applications, it shall be permitted to use additional identification at selected locations as an alternative. This means of identification shall be permitted to be by separate color coding, marking tape, tagging, or other approved means and shall be permanently posted on the inside of the main electrical control panel enclosure in a visible location. Easily identify voltages that remain on. This coincides with my public input no. 61 NFPA Items 2 & 3 of this section could easily be their own section for grounded conductors that remain on or combined with section Related Public Inputs for This Document Related Input Public Input No. 61-NFPA [Section No ] Relationship Submitter Full Name: Jim Smith Organization: Tool North Inc Submittal Date: Mon Nov 16 14:25:16 EST 2015 Resolution: There are additional methods that can be used to differentiate between AC and DC conductors that remain energized after disconnect. Page 118 of 176

119 09 of 164 4/22/2016 1:06 PM Public Input No. 61-NFPA [ Section No ] * The color ORANGE shall be used to identify ungrounded conductors that Where conductors remain energized when the main supply circuit disconnecting means is in the off position. This color identification shall be, the following color codes shall be used: (1) Black w/orange stripe for ungrounded AC power conductors (2) Orange or Red w/orange stripe for ungrounded AC control conductors (3) Blue w/orange stripe for DC control conductors These color identifications shall be strictly reserved for this application only. Exception No. 1: Internal wiring on individual devices purchased completely wired Exception No. 2: Where the insulation used is not available in the colors required (e.g., high temperature insulation, chemically resistant insulation) To follow the wiring codes of , it makes sense to follow suite with an orange designator so voltages are more easily recognized based on color that are energized while the main disconnect is off. I am seeing more and more DC requirements with respect to machine lighting and this makes it easier to identify if I am dealing with an AC circuit or a DC circuit, before I even look at the prints. Related Public Inputs for This Document Related Input Public Input No. 62-NFPA [Section No ] Relationship Submitter Full Name: Jim Smith Organization: Tool North Inc Submittal Date: Mon Nov 16 13:39:22 EST 2015 Resolution: There are additional methods that can be used to differentiate between AC and DC conductors that remain energized after disconnect. Page 119 of 176

120 10 of 164 4/22/2016 1:06 PM Public Input No. 120-NFPA [ Section No ] Where color is used for identification, the color shall be used throughout the length of the conductor either by the color of the insulation or by color markers. Exception 1 : Multiconductor cables shall be permitted to be permanently reidentified at the time of installation. Re-identification shall be by a suitable colored material (i.e.: colored electrical tape or colored conductor identification sleeve) that completely encircles the conductor at all terminal locations. Exception 2: Other conductors (except for green, green/yel, or bare) larger than 12 awg. shall be allowed to change the insuation color as above. Exception 1. We give no guidance on how to perform color re-identification of multi-conductor cable conductors. Exception 2. Gives guidance on how to color identify 10 awg. conductors and larger to be identified to voltage potential as described in Visual shock hazard awareness. Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Tue Jan 05 15:45:39 EST 2016 Resolution: The recommended text was unclear and may create a conflict within rules in NFPA 70 regarding conductor identification. Page 120 of 176

121 11 of 164 4/22/2016 1:06 PM Public Input No. 148-NFPA [ Section No ] * Nonmetallic ducts wiring chanels shall be permitted only when they are made with a flame-retardant insulating material. Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in and and is a better term. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 15:58:25 EST 2016 Resolution: FR-40-NFPA Statement: Duct was replaced with wiring channels for correlation within the standard. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in and and is a better term. Page 121 of 176

122 12 of 164 4/22/2016 1:06 PM Public Input No. 149-NFPA [ Section No ] Conductors inside enclosures shall be supported where necessary to keep them in place. Conductors that do are not run in ducts wiring channels shall be supported. Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in and and is a better term. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 16:01:39 EST 2016 Resolution: FR-41-NFPA Statement: Duct was replaced in the standard with wiring channels for correlation. The term "wiring channel" is presently used in and and is a better term. Page 122 of 176

123 13 of 164 4/22/2016 1:06 PM Public Input No. 150-NFPA [ Section No ] General Requirements. The means of introduction of cables or ducts cords with their individual glands, bushings, and so forth into an enclosure shall ensure that the degree of protection is not reduced. Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in and and is a better term. Cords was added as they can be used in some situations. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 16:05:36 EST 2016 Resolution: FR-42-NFPA Statement: The term "duct" has been replaced with wireways which is the applicable term outside of the enclosure. "Cords" was added as an additional means of entry. "Introduction" was changed to entry and "of the enclosure" was added for clarity. Page 123 of 176

124 14 of 164 4/22/2016 1:06 PM Public Input No. 147-NFPA [ Section No ] Wireways (Cable Trunking Systems) Wireways (cable trunking systems) external to enclosures shall be rigidly supported and clear of all moving or contaminating portions of the machine Covers shall be shaped to overlap the sides; gaskets shall be permitted. Covers shall be attached to wireways by hinges or chains and held closed by means of captive screws or other suitable fasteners. On horizontal wireway, the cover shall not be on the bottom. Hinged covers shall be capable of opening at least 90 degrees Where the wireway is furnished in sections, the joints between sections shall fit tightly, but shall not be required to be gasketed The only openings permitted shall be those required for wiring or for drainage Wireways shall not have opened but unused knockouts Metal thickness and construction of wireways shall comply with ANSI/UL 870. This is an IEC term and should have been deleted in the 2015 edition. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 15:27:41 EST 2016 Resolution: FR-45-NFPA Statement: "Cable trunking systems" is an IEC term and should have been deleted in the 2015 edition. Wireways is the correct term for use in NFPA 79. "trunking systems" is further explained in Annex J. Page 124 of 176

125 15 of 164 4/22/2016 1:06 PM Public Input No. 82-NFPA [ Section No ] Receptacles for Accessory Equipment. Where the machine or its associated equipment is provided with receptacle outlets to be used for accessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply: (1) Receptacles mounted external to externally or internally to the enclosure shall be ground-fault circuitinterrupter (GFCI) protected. (2) Receptacles shall be supplied from a grounded 120 volt ac source. (3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampere configuration and listed for the applied voltage. (4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with (5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified by Section Exception: Verification is not required for PELV circuits in accordance with Section (6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected against overcurrent in accordance with the provisions of 7.2.5, and these circuits shall not be connected to other machine circuits. (7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnecting device for the machine or section of the machine, the safety sign requirements of shall apply. (8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosure and subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover the receptacle when the plug is removed. Additional Proposed Changes File Name 79_PC_21-_HELD.pdf Description Approved PC 21 held Note: This Public Input originated as Public Comment No. 18 and was reported at as "Reject but Hold" in the F2014 Second Draft Report for NFPA 79, per the Regs at Submitter's Substantiation: Since some products have internally mounted receptacles that are not intended for maintenance, this closes the loop to ensure ground-fault protection. Submitter Full Name: TC on EEI-AAA Organization: NFPA Submittal Date: Tue Dec 15 10:09:48 EST 2015 Page 125 of 176

126 8/27/13 TerraView Public Comment No. 21-NFPA [ Section No ] Receptacles for Accessory Equipment. Where the machine or its associated equipment is provided with receptacle outlets to be used for accessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply: (1) Receptacles mounted external to externally or internally to the enclosure shall be ground-fault circuit-interrupter (GFCI) protected. (2) Receptacles shall be supplied from a grounded 120 volt ac source. (3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampere configuration and listed for the applied voltage. (4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with (5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified by Section Exception : Verification is not required for PELV circuits in accordance with Section (6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected against overcurrent in accordance with the provisions of 7.2.5, and these circuits shall not be connected to other machine circuits. (7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnecting device for the machine or section of the machine, the safety sign requirements of shall apply. (8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosure and subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover the receptacle when the plug is removed. Statement of Problem and Substantiation for Public Comment since some products have intenrally mounted receptacles that are not intended for maintanance, this closes the loop to ensure ground-fault protection. Submitter Full Name: RICHARD TRAINOR Organization: TUV SUD AMERICA Submittal Date: Fri Apr 26 15:50:25 EDT 2013 Committee Action: Rejected but held Resolution: This is new material that has not had public review. Copyright Assignment I, RICHARD TRAINOR, hereby irrevocably grant and assign to the National Fire Protection Association (NFPA) all and full rights in copyright in this Public Comment (including both the Proposed Change and the Statement of Problem and Substantiation). I understand and intend that I acquire no rights, including rights as a joint author, in any publication of the NFPA in w hich this Public Comment in this or another similar or derivative form is used. I hereby w arrant that I am the author of this Public Comment and that I have full pow er and authority to enter into this copyright assignment. By checking this box I affirm that I am RICHARD TRAINOR, and I agree to be legally bound by the above Copyright Assignment and the terms and conditions contained therein. I understand and intend that, by checking this box, I am creating an electronic signature that w ill, upon my submission of this form, have the same legal force and effect as a handw ritten signature Page 126 of 176 submittals.nfpa.org/terraviewweb/viewerpage.jsp 12/41

127 16 of 164 4/22/2016 1:06 PM Resolution: FR-46-NFPA Statement: The revision will require ground fault circuit interrupter on internal receptacles and increase safety. Page 127 of 176

128 17 of 164 4/22/2016 1:06 PM Public Input No. 91-NFPA [ Section No ] Receptacles for Accessory Equipment. Where the machine or its associated equipment is provided with receptacle outlets to be used for accessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply: (1) Receptacles mounted external to the enclosure shall be ground-fault circuit-interrupter (GFCI) protected. (2) Receptacles shall be supplied from a grounded 120 volt ac source. (3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampere configuration and listed for the applied voltage. (4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with (5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified by Section Exception: Verification is not required for PELV circuits in accordance with Section (6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected against overcurrent in accordance with the provisions of 7.2.5, and these circuits shall not be connected to other machine circuits. (7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnecting device for the machine or section of the machine, the safety sign requirements of shall apply. (8) Receptacles shall be suitable for the environment. Receptacles mounted external to the enclosure and subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover the receptacle when the plug is removed. Exception: Dedicated receptacles for use in critical systems which are required continuously for the proper function of the machine, shall not require ground-fault circuit-interrupter (GFCI) protection. Such dedicated receptacles shall be marked to indicate it is a critical system receptacle and not for general use. Critical systems, in the event of power loss would lead to a hazardous condition, shall be allowed the exception to the GFCI requirement. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Thu Dec 24 09:27:06 EST 2015 Resolution: The recommendation was unclear and there is no definition of critical systems provided. Page 128 of 176

129 18 of 164 4/22/2016 1:06 PM Public Input No. 177-NFPA [ New Section after ] TITLE OF NEW CONTENT Machine mounted lighting Type your content here...machine mounted lighting that is part of an industrial machine, either internal (within the point of operation area) or external (near the point of operation providing illumination of the area) shall have ground-fault circuit interrupter (GFCI) protection for personnel. GFCI protection is specified receptacles mounted and used on the machine tool, but the lighting fixtures can expose the personnel to the same shock hazard during maintenance or failed operation (breakage of cover or lenses). Many machine use water based coolants or cutting solutions that accumulate on the machine tool surfaces, and area surrounding. Not much different than a dwelling unit "basement" or "garage." (NFPA (A). Submitter Full Name: George Schreck Organization: Komatsu America Industries, LL Submittal Date: Thu Jan 07 15:32:00 EST 2016 Resolution: The submission did not present adequate substantiation that all lighting requires GFCI protection. Page 129 of 176

130 19 of 164 4/22/2016 1:06 PM Public Input No. 63-NFPA [ Section No ] * Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety sign in accordance with ANSI Z535 series, which deals with product safety signs. Additional Proposed Changes File Name Description Approved NFPA_79_proposal_egloff_2015.docx proposed change. I have some pictures of machines we have with more ANSI stickers than a nascar car - information overload. I did not include them, but can bring examples to the meeting. I have also had experience with the use of non-standard stickers, which are confusing. The use of stickers to alert users of hazards should extend beyond just electrical hazards and include other hazards of the equipment. But too many stickers will be ignored by a user. The committee may want to suggest a limit, but I suggest adding this as guidance to the asterix'd comments in the appendix. Machines and equipment have other hazards than electrical. Signs alerting users to hazards other than electrical should be stated in the standard. The number of signs should not be "excessive" or users will suffer "information overload" and tend to ignore all of the signs. I don't think that anyone has established a limit as to how many signs constitute information overload so I propose having this in explanatory appendix material. Also, ANSI format should be used for all signs. I have had to deal with "non-standard signs." They are as deciding to use a round blue traffic stop sign instead of the expected 8-sided red one. The current language mentions only signs regarding electrical hazards within the machine. Submitter Full Name: MATT EGLOFF Organization: MONTANA TECH UNIVERSITY OF MO Affilliation: None Submittal Date: Wed Nov 18 14:36:44 EST 2015 Resolution: The recommendation was overly broad.the submitter did not define limits (quantity and subject) allowed. Page 130 of 176

131 16.2.1* Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety sign in accordance with ANSI Z535 series, which deals with product safety signs. Modified: Enclosures that do not clearly show that they contain electrical devices shall be marked with a safety sign. Machines shall be marked with safety signs indicating hazards. Safety signs shall comply with ANSI Z535 series, which deals with product safety signs. Explanatory add* Excessive use of safety signs shall be avoided as this detracts from alerting users to dangers by presenting too much information. Page 131 of 176

132 20 of 164 4/22/2016 1:06 PM Public Input No. 113-NFPA [ Section No ] The full-load current shown on the nameplate shall not be less than the full-load currents for all motors and other equipment that can be in operation at the same time under normal conditions of use. Where unusual loads or duty cycles require oversized conductors, the required capacity shall be included in the full-load current specified on the nameplate. The full-load current rating shall not be grater than 125% of the measure input current. Some products are sold in different configurations which result in different input current values, or input current is determined based on adding the rated currents of components in the product. When measuring a products overall input current I have found that products operate much less than their ratings. This requires end users to increase or add to their installation (receptacles, wiring, overcurrent protection, etc.) unnecessarily and can result in overcurrent protection that may never open under a fault condition. Submitter Full Name: Richard Trainor Organization: TUV SUD America Inc. Submittal Date: Tue Jan 05 11:35:45 EST 2016 Resolution: The added requirement will lead to the necessity to input test all machines. This will not be possible with all machines until installation is complete. Page 132 of 176

133 21 of 164 4/22/2016 1:06 PM Public Input No. 85-NFPA [ Section No ] 17.2 Information to Be Provided. The following information shall be provided with the electrical equipment: (1) Clear, comprehensive description of the equipment, installation and mounting, and the connection to the electrical supply(ies) (2) Electrical supply circuit(s) requirements (3) Overview (block) diagram(s) where appropriate (4) Schematic diagram(s) (5) Information (where appropriate) on the following: (6) Programming (7) Sequence of operation(s) (8) Frequency of inspection (9) Frequency and method of functional testing (10) Adjustment, maintenance, and repair (11) Interconnection diagram (12) Panel layouts (13) Instruction and service manuals (14) Physical environment (e.g., lighting, vibration, noise levels, atmospheric contaminants) (15) A description (including interconnection diagrams) of the safeguards, interacting functions, and interlocking of guards with potentially hazardous motions (16) A description of the safeguarding means and methods provided where the primary safeguards are overridden (e.g., manual programming, program verification) (17) Information for safety lockout procedure (18) Explanation of unique terms (19) Parts list and recommended spare parts list (20) Maintenance instructions and adjustment procedures (21) Reference information (where appropriate) on the following: (22) Lubrication diagram (23) Pneumatic diagram (24) Hydraulic diagram (25) Miscellaneous system diagrams (e.g., coolant, refrigerant) Change (8) Information necessary to establish an Electrically Safe Work Condition. The term "Safety Lockout" implies that there are differing "flavors" of Lockout? A "Safety" lockout vs just Lockout / tagout? Also, Lockout is not defined. NFPA 70E defines "Electrically Safe Work Condition" which is also concise and inclusive. Page 133 of 176

134 22 of 164 4/22/2016 1:06 PM Submitter Full Name: Earl Sowders Organization: Toyota Engineering Submittal Date: Wed Dec 16 08:45:49 EST 2015 Resolution: FR-54-NFPA Statement: Parenthesis 8 has been revised to provide clarity as the term "control of hazardous energies" better reflects the information necessary to accomplish this requirement. Page 134 of 176

135 23 of 164 4/22/2016 1:06 PM Public Input No. 160-NFPA [ Section No ] * Diagrams, including machine schematics, of the electrical system shall be provided and shall show the electrical circuits on the machine and its associated electrical equipment. Electrical symbols shall be in accordance with IEEE 315/315A where included therein, or in accordance with other symbol standards as agreed upon by the supplier and customer. Any electrical symbols not included in IEEE 315/315A shall be separately shown and described on the diagrams. The symbols and identification of components and devices shall be consistent throughout all documents and on the machine. Exception: Wiring schematics shall not be required for commercially available or field replaceable components. There are many existing installations and engineered designs which include symbols that are not per IEEE315. Customers and suppliers alike for many years have used other symbologies, such as JIC125. Requiring solely the IEEE315 symbol libraries would introduce symbols and diagrams unfamiliar to many customers and manufacturers. Submitter Full Name: William Brungs Organization: Intelligrated Systems Submittal Date: Thu Jan 07 13:13:07 EST 2016 Resolution: The addition of the information recommended by the submitter does not enhance application or usability of NFPA 79. Additional revisions to or adding a line item to annex B may address the intent of the public input. Page 135 of 176

136 24 of 164 4/22/2016 1:06 PM Public Input No. 99-NFPA [ Section No ] 18.1 * General. The verification of the continuity of the equipment grounding circuit shall be conducted and documented when the requirements of chapter 8 are not strictly satisfied. When the electrical equipment is modified, the requirements in Section 18.7 shall apply. Applicable tests shall be performed where deemed necessary in accordance with the references in the following list: (1) Verification that the electrical equipment is in compliance with the technical documentation (see Chapter 17 ) (2) Insulation resistance test (see Section 18.3 ) (3) Voltage test (see Section 18.4 ) (4) Protection against residual voltages test (see Section 18.5 ) (5) Functional test (see Section 18.6 ) The ground continuity test should only be a requirement based on need and/or the design practice. NFPA 70 and 79 detail design practice which will result in the correct performance. When the standards are not followed strictly, the equipment grounding circuit performance must be verified by testing. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Sun Dec 27 20:48:44 EST 2015 Resolution: The requirements of Chapter 8 are design requirements, not a substitute for test requirements. Not complying with CH. 8 should not be the only reason for implementing the requirement in 18.1as recommended in the PI. The phrase "where practicable" for "where deemed necessary" or revisions to 18.2 may accomplish the intent of this Public Input. Page 136 of 176

137 25 of 164 4/22/2016 1:06 PM Public Input No. 105-NFPA [ New Section after A ] A.3.xx Basic protection Previously referred to as "protection against direct contact" Annex note to clarify change to terminology Related Public Inputs for This Document Related Input Public Input No. 104-NFPA [New Section after 3.3.8] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 12:13:22 EST 2016 Resolution: FR-20-NFPA Statement: The committee accepts the new definition of basic protection but adds the term protection from direct contact in parenthesis for historical reference for one revision cycle for a better understanding of the terms. The committee also accepts the new annex note. Page 137 of 176

138 26 of 164 4/22/2016 1:06 PM Public Input No. 133-NFPA [ Section No. A ] A Cableless Wireless Operator Control Station. These stations are not physically connected to the machine by either communications or power conductors. While all cableless devices utilize wireless technology, not all wireless devices are cableless. Examples of cableless wireless devices include cableless wireless hand held devices wireless teach pendants, cableless wireless crane pendants, and cableless wireless jog pendants. Wireless is a more commonly used term. Commercially available products described this way are used for industrial machinery control and status indication. The standard should be consistent with the products used. Stating that "not all wireless devices are cableless" dos not clearly explain the concept and adds confusion. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 10:19:30 EST 2016 Resolution: This proposal doesn't provide sufficient substantiation to change the language. Page 138 of 176

139 27 of 164 4/22/2016 1:06 PM Public Input No. 88-NFPA [ New Section after A ] A Exposed Components which are designed to prevent unintentional contact with live circuits, also known as finger-safe, qualify as proper guarding to exposed live parts. The term finger safe is often specified in machine electrical requirements. Component manufacturers list products as finger safe, but there is no direct correlation to exposed or guarding of exposed circuits. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Thu Dec 24 08:52:09 EST 2015 Resolution: The style manual does not permit mandatory text "qualify" within annex material. Page 139 of 176

140 28 of 164 4/22/2016 1:06 PM Public Input No. 106-NFPA [ New Section after A ] A.3.yy Fault protection previously referred to as "protection against indirect contact" Annex note to clarify change to new terminology. Related Public Inputs for This Document Related Input Public Input No. 103-NFPA [New Section after ] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Mon Jan 04 12:17:49 EST 2016 Resolution: FR-22-NFPA Statement: The committee accepts the new definition of the term fault protection but adds the term protection from indirect contact for historical reference for one revision cycle for a better understanding of the terms. The committee also accepts the new annex note. Page 140 of 176

141 29 of 164 4/22/2016 1:06 PM Public Input No. 89-NFPA [ New Section after A ] A Industrial Control Panel Control stations or pendants which contain only operator interface devices (pushbuttons, selector switches, or similar input means) are not considered an industrial control panel. This clarifies that a control station (operator interface functionality of control circuit) is not an industrial control panel when it only consists of control circuit interface operators. There is ambiguity as to whether all control stations are a control panels. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Thu Dec 24 09:01:05 EST 2015 Resolution: The proposed informative text is in conflict with the normative text and is mandatory language which is not permitted in the Annex. Page 141 of 176

142 30 of 164 4/22/2016 1:06 PM Public Input No. 90-NFPA [ New Section after A ] A Obstacle Commonly referred to as electrically palm safe. By establishing that an obstacle is palm safe, the degree of protection from live parts is more easily understood. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Thu Dec 24 09:19:53 EST 2015 Resolution: The proposed change conflicts with in the way "obstacle" is used in that defined term. Page 142 of 176

143 31 of 164 4/22/2016 1:06 PM Public Input No. 92-NFPA [ New Section after A ] A.4.8 Available Fault Current It is the responsibility of the user to ensure this requirement is satisfied. Clarification of the responsible party (owner of building service connection) will eliminate the confusion which often occurs. Users assume the machine manufacturer must supply a short circuit rated machine which is appropriate for their service. This information is commonly unknown to the machine manufacturer. The user is required to determine this data. Therefore, the responsibility should rest on the user to ensure the requirement is met. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 12:18:26 EST 2015 Resolution: Mandatory language and assignment of responsibility is not permitted in the annex. The proposed text may be more appropriate as normative text. Page 143 of 176

144 32 of 164 4/22/2016 1:06 PM Public Input No. 184-NFPA [ Section No. A.6.2 ] A Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free. PI162 Moved voltage reference to Related Public Inputs for This Document Related Input Public Input No. 162-NFPA [Chapter 6] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Thu Jan 07 16:16:59 EST 2016 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Page 144 of 176

145 33 of 164 4/22/2016 1:06 PM Moving A to A PI162 moved reference section. Page 145 of 176

146 34 of 164 4/22/2016 1:06 PM Public Input No. 96-NFPA [ Section No. A.6.2 ] A.6.2 In order to satisfy the requirements of section 6.2, the requirements detailed in section or shall be met. Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free. By adopting the proposed text, the ambiguity of whether all requirements must be met, in this section, will be eliminated. Submitter Full Name: ROBERT GRUENDEL Organization: DEMATIC Submittal Date: Fri Dec 25 20:01:00 EST 2015 Resolution: The proposed text is mandatory and not permitted in Annex material. Page 146 of 176

147 35 of 164 4/22/2016 1:06 PM Public Input No. 185-NFPA [ Section No. A ] A See NFPA 70E, for additional information on work practices. PI162 moved referenced section. Related Public Inputs for This Document Related Input Public Input No. 162-NFPA [Chapter 6] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Thu Jan 07 16:18:16 EST 2016 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Page 147 of 176

148 36 of 164 4/22/2016 1:06 PM Moving A to A PI162 moved reference section. Page 148 of 176

149 37 of 164 4/22/2016 1:06 PM Public Input No. 186-NFPA [ Section No. A ] A Ripple-free is conventionally defined for a sinusoidal ripple voltage as a ripple content of not more than 10 percent rms. For additional information on isolating transformers, refer to IEC and IEC In addition, the following measures need to be considered: (1) The type of supply and grounding system (2) The impedance values of the different elements of the equipment grounding system (3) The characteristics of the protective devices used to detect insulation failure PI162 moved reference section Related Public Inputs for This Document Related Input Public Input No. 162-NFPA [Chapter 6] Relationship Submitter Full Name: Jay Tamblingson Organization: Rockwell Automation Submittal Date: Thu Jan 07 16:19:32 EST 2016 Resolution: FR-28-NFPA Statement: To maintain consistency with IEC and other IEC standards, the section is revised to use the terms Basic Protection and Fault Protection as they are not in conflict with NEC terms. The IEC terminology protection against direct contact has been replaced with basic protection and the term protection against indirect contact has been replaced with fault protection. The revised language aligns NFPA 79 with similar language in Ed. 6 of IEC The revised text retains the use of the term Live parts in section for consistency within NFPA 79 and the NEC. Renumbering of was done to correct editorial errors and group "enclosure" related requirements together. The phrase and warn of potential arc-flash hazards was removed because Chapter 16 contains the requirements for markings and signs. Figure was retained as normative requirements cannot be located in an informative annex. Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be used for industrial machinery as protection from shock. Page 149 of 176

150 38 of 164 4/22/2016 1:06 PM Annex Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated. Moving A to A PI162 moved reference section. Moving A to A PI162 moved reference section. Page 150 of 176

151 39 of 164 4/22/2016 1:06 PM Public Input No. 174-NFPA [ New Section after A ] A For example, see UL Subject 2237 and UL This annex note provides a reference to two standards that address the cable assemblies and associated wiring devices that the proposed describes. Related Public Inputs for This Document Related Input Public Input No. 172-NFPA [New Section after ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 15:15:48 EST 2016 Resolution: FR-36-NFPA Statement: Product standards and products are available for wiring system components suitable for industrial machinery including cable assemblies and associated wiring devices such as tees, panel-mounted fittings, field-wired fittings, and so forth. Annex material will be submitted. The new annex note provides a reference to two standards that address the cable assemblies and associated wiring devices that describes. Page 151 of 176

152 40 of 164 4/22/2016 1:06 PM Public Input No. 166-NFPA [ Section No. A ] A For additional information on flexible cords, refer to ANSI/UL 62. This change is meant to correct an editing oversight. Change "6" to "7". The note was not renumbered during the 2012 Edition cycle when was renumbered to This change is associated with proposed changes to and Related Public Inputs for This Document Related Input Public Input No. 165-NFPA [Section No ] Relationship Submitter Full Name: Roger Plemmons Organization: Rockwell Automation Submittal Date: Thu Jan 07 14:13:06 EST 2016 Resolution: FR-37-NFPA Statement: This FR is correcting an error in the last edition of the standard by removing an asterisk and adding it to Page 152 of 176

153 41 of 164 4/22/2016 1:06 PM Public Input No. 151-NFPA [ Section No. B.1 ] B.1 DELETE "duct" in item 25. It is recommended that the information in Figure B.1 be provided by the intended user of the equipment. It facilitates an agreement between the user and supplier on basic conditions and additional user requirements to ensure proper design, application, and utilization of the electrical equipment of the machine (see Section 4.1). Figure B.1 Inquiry Form for the Electrical Equipment of Machines. Page 153 of 176

154 42 of 164 4/22/2016 1:06 PM Duct is an IEC term and is included in Annex J3. Duct is also commonly used to refer to non-electric products such as air duct. It should not be used to describe an electric product in NFPA 79. The term "wiring channel" is presently used in and and is a better term. Submitter Full Name: Paul Dobrowsky Organization: Innovative Technology Services Submittal Date: Wed Jan 06 16:08:36 EST 2016 Resolution: FR-43-NFPA Statement: Replace the term "DUCT" with "wireways" in item 25 to be consistent within the standard. The term "duct" has been replaced with wireways which is the applicable term outside of the enclosure. Page 154 of 176

155 43 of 164 4/22/2016 1:06 PM Public Input No. 152-NFPA [ Section No. D.1 ] Page 155 of 176

156 44 of 164 4/22/2016 1:06 PM D.1 DELETE "duct" in FIGURE D.1(h) Page 156 of 176

157 45 of 164 4/22/2016 1:06 PM Figure D.1(a) through Figure D.1(v) are not intended to be (design) guidelines. They are included only to illustrate documentation methods. Figure D.1(a) Cover Sheet and Sheet Index. Figure D.1(b) System Layout and Installation Diagram. Figure D.1(c) Block (System) Diagram. Figure D.1(d) Interconnection Diagram. Figure D.1(e) Elementary Schematic. Page 157 of 176

158 46 of 164 4/22/2016 1:06 PM Figure D.1(f) PLC Input Diagram. Page 158 of 176

159 47 of 164 4/22/2016 1:06 PM Figure D.1(g) PLC Output Diagram. Page 159 of 176

160 48 of 164 4/22/2016 1:06 PM Figure D.1(h) Sample Enclosure Layout Interior. Figure D.1(i) Sample Enclosure Layout Exterior. Page 160 of 176

161 49 of 164 4/22/2016 1:06 PM Figure D.1(j) Sequence of Operations Graphical. Figure D.1(k) Sequence of Operations Descriptive Graphical. Figure D.1(l) Sample Servo Diagram. Page 161 of 176

162 50 of 164 4/22/2016 1:06 PM Figure D.1(m) Sample PLC Network Station Layout. Page 162 of 176

163 51 of 164 4/22/2016 1:06 PM Figure D.1(n) Sample Operator Station. Page 163 of 176

164 52 of 164 4/22/2016 1:06 PM Figure D.1(o) Sample Parts List. Figure D.1(p) ISO (A2) Drawing Standard Framework. Page 164 of 176