4888 and 4988 Outdoor Protected Entrance Terminals

Transcription

1 4888 and 4988 Outdoor Protected Entrance Terminals Underwriters Laboratories (UL) Listed Instructions January Revision C

2 Contents: 1.0 General Accessories Protector Specifications Tool Requirements Terminal Locations Terminal Grounding Entrance Cable Preparation and Termination Multiple Terminal Installation Distribution Cable Termination Protector Installation and Testing Skirt Kit Installation General The 3M brand outdoor Protected Entrance Terminals (PETs) provide protection and termination of entrance and distribution cables, are available in 25, 50 and 100 pair count and are Underwriters Laboratories (UL) Listed The terminals contain the following features and components: a. A short stub; with one end preconnectorized to a flame retardant MS 2TM modular connector body/cover, the other end prewired to the protector receptacle. The 4888-B and 4988-B PETs contain a 710-type splice connector instead of the MS 2 modular connector. b. A flame retardant modular connector base. c. A protector receptacle field. e. Strain relief components for entrance cable. f. An external 3-port ground bar. g. An internal insulated ground strap. h. Mounting template and mounting screws (4). i. Distribution terminal points. j. Pair count log label. k. "Quiet Front" Terminal screws. l Pair Test Probe, 4347 Pair Test Clip. d. An integral splice chamber. 1

3 1.02 Terminal Wiring Schematics: Model Module From C.O. 26 AWG Fuse Wire Module From C.O. 26 AWG Fuse Wire 1.03 Terminal Dimensions 2.0 Accessories Coupling Kit - The 4889 Coupling Kit is used for stacking two or more terminals Skirt Adapter - The 4890 Skirt Adapter is used to attach a BET PED Skirt to a 4888 or 4988 terminal SS Pair Probe - The 4327 SS Pair Probe provides electrical access to a pair of 4320 Self Strip contacts Pair Test Clip - The 4347 Pair Test Clip allows for test connections to be made to both Tip and Ring binding post screw washers simultaneously on all types of 3M Brand Modular Hardwire Blocks. 3.0 Protector Specifications To maintain UL Listing, only five pin protectors that are UL Recognized or Listed can be used. 4.0 Tool Requirements Height Width Depth 24" (610 mm) 24" (610 mm) 24" (610 mm) Protector Protector 4988 Wiring Schematic 14 3/4" (375 mm) 14 3/4" (375 mm) 14 3/4" (375 mm) Modular Hardwire Block 4888 Wiring Schematic Self Strip Block 7" (178 mm) 7" (178 mm) 7" (178 mm) The following tools are required to install the 3M brand PETs: Typical Entrance Cable - Standard Hand Tools - MS 2 Modular Splicing Rig - MS Splice Head Frame Adapter - "B" versions require 710 Connector Splicing Rig Terminal Locations 5.01 Locate terminal according to standard operating procedures. Consider the following points as much as possible: 7.0 Entrance Cable Preparation and Termination a. Locate terminal on a firm mounting surface where it will be accessible to the technicians at all times; where it can be reached without a ladder; and where it will not project in a hazardous manner. CAUTION: Avoid locations near flammable materials, ignitable gases, dust, moisture, temperature extremes, moving machinery, electric light and power circuits, and electrical equipment. b. Observe caution when exposing terminal to chemicals in liquid or vapor form as they may damage the plastic components Open enclosure door by using a 7/16" terminal wrench Open the splicing chamber by removing the two screws on the splice chamber door. Reinsert screws in tapped holes to avoid losing screws Pull the preterminated short stub, insulated ground wire, and accessories out of the splicing chamber Tape the mounting template to the designated position and mark screw locations (4). Remove mounting template Mount the terminal in designated position with the four mounting screws provided. 6.0 Terminal Grounding Protected entrance terminals are to be installed in accordance with Article 800, Section C of the National Electric Code (ANSI/NFPA 70). Fasten a #6 AWG wire to the ground bar which is located on the front of the unit. Connect other end of ground wire to local ground per company standards. Failure to properly bond and ground the terminal per N.E.C. or local equivalent codes may render protection arrestors useless. The maximum cable diameter for this terminal is 1 1/2" (38 mm). Minimum cable diameter allowed in the area of PST application is 1" (25 mm). If the cable diameter is smaller than 1" (25 mm), build up diameter by applying Scotch TM 88T Vinyl Tape or equivalent.

4 7.01 Extend entrance cable at least 30" (762 mm) past cable entry port. Temporarily fasten cable to wall 18" (457 mm) minimum, above or below terminal, dependent on cable entrance choice Remove knockout at selected cable entry location For bottom entry, slide 3M brand Pull'N'Shrink Tubing (PST) over cable sheath with pull tab facing down. Slide gland (without nut) over cable sheath with fingers facing down. For top entry, pull tab on PST and fingers on gland must be facing up when sliding over cable sheath Attach insulated ground wire to bonding connector per standard procedure Slide PST over gland assembly and butt up to terminal. Slowly unwind loose core tail in a counterclockwise direction while edging PST toward terminal side as the core is removed. Bottom Entry Core Wrap Temporarily tape PST and gland to wall, cable or other suitable surface to keep the PST and gland out of the way Lay cable against terminal and mark sheath allowing for a minimum of 2" (51 mm) of cable sheath to extend past the cable entry port. 1/2" (13 mm) The PST must be positioned a maximum of 3/8" (10 mm) away from the terminal entry port. If this dimension is not achieved, remove collapsed PST with a sharp knife and remove cable and gland from terminal. Repeat steps 7.03, 7.08, 7.09, 7.10, 7.11 and After positioning PST as close as possible to terminal, continue core removal to collapse PST over the gland. Complete core removal. 2" (51 mm) Remove cable sheath leaving a minimum of 1/2" (13 mm) of core wrap to protect cable from bonding connector. Conductor length should be a minimum of 27" (686 mm). Install bonding connector per standard procedure Identify and tape ends of binder groups to keep conductors from unwinding during splicing Install the cable through cable entry port into the splice chamber of the terminal Slide the gland up the cable and insert into the cable entry port. While holding gland in this position, slide nut over cable beyond bonding connector and install gland and nut Wire Termination: a. Attach 4041 Splice Head to 4044 Frame Adapter. Snap adapter legs into diamondshaped cutouts in bracket. Gold adapter must be placed in splice head before splicing

5 b. Place modular connector base onto splicing head. The cut corner of the base should be on the left-hand side and rear of the splicing head. c. Select entrance cable binder group and lay into base by color code. Check conductor order with check comb. Select matching binder group from preconnectorized short stub. Place body/cover on top of base, matching the cut corners. d. Crimp connector using the 4030, 4031 or 4036 crimping unit. e. Install sealant boxes on modules. For health, safety, and disposal information, see sealant box label or Material Safety Data Sheet. f. For wire termination onto the preconnectorized 710-type connector short stub, refer to the Bell System practice, section g. Remove door from terminal. Reinstall door when wire termination is completed. h. Remove clamp from traverse bar assembly and mount traverse bar 3" (76 mm) from PET with two #12 wood screws (not supplied). 8.0 Multiple Terminal Installation 8.01 Vertical Stacking The design of the integral splice chamber enables up to three PETs of same pair count to be stacked vertically (dependent on cable diameter). Vertical stacking is used when the entrance cable pair count is greater than the capacity of a single PET or when the installation design requires that only a portion of entrance cable pairs be initially terminated. a. Fasten entrance cable to the wall above or below terminals, dependent upon cable entrance choice. Attach the PETs to the mounting surface in a vertical arrangement. Use the mounting template to ensure proper spacing between terminals. b. When stacking vertically, a coupling kit must be used to connect the cabinets at the splice chambers. c. Install stacked units starting from bottom. When using the coupling kit the fingers on the gland must be trimmed After termination is complete, neatly bundle wire and modular connectors and lay in splice chamber. Close chamber door and secure with screws supplied or any #8-32 screw 1/4" - 1/2" (6 mm - 13 mm) long to meet UL requirements Scotchlok TM UR and UY Connectors may be substituted for the modular connectors on the preconnectorized short stub. Use Scotchlok E-9 Series Tools for proper crimping of connectors. d. Remove cable sheath, leaving a minimum of 1/2" (13 mm) of core wrap to protect cable from bonding connector. Free conductor length should be equal to or longer than the vertical length of the mounted PETs. e. Identify and tape ends of binder groups to keep conductors from unwinding during splicing operations. f. Install binder groups into the corresponding PETs through the entry gland. For wire termination onto preconnectorized short stub, refer to the MS 2 Splicing Instruction Bulletin. g. When the installation design requires that only a portion of entrance cable pairs be initially terminated, the free conductors should be a minimum of 27" (686 mm) from the farthest PET cable entry port. Tape ends together and neatly lay them into the integral splice chamber on top of the terminated cable pairs. 4

6 9.0 Distribution Cable Termination Protected Entrance Terminals Terminate station wire or AWG jumper wire onto Modular Hardwire Block with screwdriver. a. Split pair (Tip-left, Ring-right) at the assigned binding post. Strip wire ends. b. Wrap wires between washers in a clockwise direction. Single wrap each wire and trim excess wire. Excessive tightening of screw may break wire. f. Always route jumper wire below the connected cap Testing 4888 Terminal " (51 mm) Slack Loop Binding post screw heads have been coated with a nonconductive material resulting in a "Quiet Front" condition. Use only approved test equipment on block. Quiet Front Coating c. Route wires from bottom row of binding posts UP to jumper runway. d. Lay wires into runway between binding posts and route wires through wire guides Protected Entrance Terminals Terminate station wire or AWG jumper wire to feeder block. a. Split pair (Tip-left, Ring-right) at assigned cap position. Wire ends should not be stripped. b. Form 90 hook on end of jumper wire. Make sure wires have clean cut ends. a. Connect test set to talk block. c. Test per standard procedure Testing 4988 Terminal b. Attach 4347 Test Clip onto washers of tip and ring of one pair /2" - 3/4" (13-19 mm) a. Align pair probe. Tip Cap Ring Cap c. Make sure assigned caps are in the unconnected position with the screwdriver slot orientated vertically. Cap Test Ports d. Insert wire into entry port through the cap until the wire is visible from the exit port. e. Insert screwdriver in cap slot and rotate 90 clockwise until you feel the cap come to rest against the stop. As the cap rotates, the wire is simultaneously connected and trimmed off. Tip Ring Make sure screwdriver blade is fully inserted into cap slot before rotating. Pair probe attaches to connected or unconnected caps. Connected Cap Position Unconnected Position

7 b. Insert pins in test ports. Depress spring loaded clamps sufficiently to allow clearance over cap heads Skirt Kit Installation PET Terminal Wall Lock Washer Carriage Bolt Release and position fingers behind clamps. Push pair probe forward until the clamps snap behind the cap heads. Nut Skirt Adapter Skirt Wall Priority Caps prevent unauthorized (test probe) access. c. Remove probe by depressing clamps clear of the cap head and pulling pair probe clear of the caps Protector Installation and Testing Fully insert appropriate UL Recognized or Listed protector into protector receptacle. Refer to Section 3.0. Important: All protectors must be fully inserted during testing. Standard protector jack field pin configurations are used with the central grounding pin serving to polarize the module. A pair of long pins on each module connect TIP and RING to the entrance cable side while shorter pins connect to the line side. Detents on the longer pins hold the protector in place when it is pulled out to an intermediate position to disconnect the line. When in this position, the entrance cable side continues to be protected

8 MS 2, Scotch and Scotchlok are registered trademarks of 3M. Important Notice All statements, technical information and recommendations related to the Seller's products are based on information believed to be reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use. Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all warranties, express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose which warranties are hereby expressly disclaimed. SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE C 3M Telecom Systems Group 6801 River Place Blvd. Austin, TX M 1997 Litho in U.S.A.