1993 Specifications CSJ SPECIAL SPECIFICATION ITEM Cabinet

Transcription

1 1993 Specifications CSJ Description. SPECIAL SPECIFICATION ITEM 6387 Cabinet This Item shall govern for the furnishing and installation of Type 3, Type 5 and Type P cabinets as shown on the plans, as detailed in this Special Specification and as directed by the Engineer. These cabinets shall house the various surveillance and control equipment required for the system. Upon completion of the work, each cabinet shall be properly installed and tested. 2.0 Materials. 2.1 General. Each cabinet shall be provided complete with all internal components, back and side panels, terminal strips, harnesses, and connectors as well as all mounting hardware necessary to provide for installation of equipment as described herein. All cabinets of the same type shall be identical in size, shape and quality throughout the entire project. In addition, the cabinets shall be equipped internally as specified herein. All cabinets shall be constructed of welded sheet aluminum with a minimum thickness of 3/16 inch. No wood, wood fiber product, or flammable products shall be allowed in the cabinet. The cabinet structure shall be effectively sealed to prevent the entry of rain, dust and dirt. All exterior seams for cabinet and doors shall be continuously welded. All edges shall be filed to a radius of inch minimum. Cabinets shall conform to the requirements of ASTM designation: 5052-H32 aluminum sheet. B209 for Welding on aluminum cabinets shall be done by the gas metal arc (MIG) or gas tungsten arc (TIG) process using bare aluminum welding electrodes. Electrodes shall conform to the requirements of the American Welding Society (AWS) A5.10 for ER5356 aluminum alloy bare welding electrodes. Procedures, welding machines and welding machine operators for welding on aluminum shall be qualified in accordance with the requirements of AWS B3.0, "Welding Procedures and Performance Qualification" and to the practices recommended in AWS C5.6. The cabinets shall be complete with shelves for supporting all equipment. An unused space of 12 inches in height, 15 inches in width, and 14 inches in depth shall be provided for future expansion. The cabinet door shall be sturdy and torsionally rigid. The door shall substantially cover the full area of the front of the cabinet and shall be attached by a minimum of two heavy duty hinges for the Type 3 cabinet

2 and three heavy duty hinges for the Type 5 and type P cabinet. Cabinets in excess of 48 inches in width shall be equipped with two side-by-side doors. Each door shall meet the requirements outlined in this Specification. The hinges shall utilize stainless steel hinge pins. The hinge and door assembly shall be of sufficient strength to withstand a 50 pound per vertical foot of door height load supplied vertically to the outer edge of the door. There shall be no deformation or impairment of the door, locking mechanism or door seal when the load is removed. Details of the cabinet design shall be submitted to the Engineer for review and approval prior to fabrication. Each cabinet door shall be provided with a No. 2 Corbin lock and a door handle of sturdy construction. Two keys for the tumbler lock shall be provided for each cabinet. The handle and lock unit shall be designed to assure that the handle cannot be disengaged from the locking device while the cabinet door is closed. The handle and lock unit shall also be designed to permit closing and locking of the door without the use of a key. A three point latch shall be provided on the cabinets. The cabinet door shall be provided with a catch mechanism to hold the door open at two positions - 90 degrees, plus or minus 10 degrees, and 180 degrees plus or minus 10 degrees. Both the door and door stop mechanism shall be of sufficient strength to withstand a simulated wind load of five pounds per square foot of door area applied to both inside and outside surfaces without failure, permanent deformation, or compromising of door position. The cabinets shall not have auxiliary police doors. A gasket shall be provided to act as a permanent and weather resistant seal at the cabinet door facing. The gasket material shall be of a nonabsorbent material and shall maintain its resiliency after long term exposure to the outdoor environment. The gasket shall have a minimum thickness of 3/8 inch. The gasket shall be located in a channel provided for this purpose either on the cabinet or on the door. An "L" bracket is acceptable in lieu of this channel if the gasket is fitted snugly against the bracket to insure a uniformly dust and weather resistant seal around the entire door facing. 2.2 Functional Requirements. The cabinets shall house the particular complement of field equipment as shown on the plans. The cabinets shall be provided with fully wired back and side panels, with all the necessary terminal boards, wiring, harnesses, connectors and attachment hardware for each cabinet location. All terminals and panel facilities shall be placed on the lower portion of the cabinet walls below all shelves. The Contractor shall submit a cabinet layout for each cabinet location for approval by the Engineer. Only cabinets with an approved layout will be accepted under this project. Each field cabinet, as a minimum, shall be supplied with the following: Fan & Thermostat Left Side Power Distribution Panel Filter Adjustable Shelves, as Required Back Panel Light Right Side Panel Surge Protection Terminal Blocks

3 Interconnect Harnesses with Connectors Voice Communication Jack "Door Open" connection to back panel All Necessary Installation and Mounting Hardware 2.3 Electrical Requirements Left Side Panel. The cabinets shall be furnished with a 115 VAC power distribution panel mounted on the lower left hand inside wall when facing the front door opening of the cabinet. The Contractor shall provide a detailed layout for approval by the Engineer. This panel shall include the following components: 1) Duplex Outlet. A 115 VAC convenience outlet shall be provided with integral ground fault interrupt and shall be protected by a circuit breaker. The receptacle shall be a NEMA Type 5-15R duplex receptacle located so that no electrical hazard shall exist when used by service personnel. 2) Circuit Breakers. The circuit breakers shall be approved and listed by Underwriters Laboratories. The operating mechanism shall be enclosed and the switches shall be marked to indicate whether it is in the closed or open position. Contacts shall be silver alloy enclosed in an arc quenching chamber. Each cabinet shall have, as a minimum, a single pole, 20 amp circuit breaker to protect the lamp, vent fan and duplex outlet. In addition, properly rated equipment circuit breakers shall be provided for the configuration of equipment in each cabinet. Circuit breakers shall be unaffected by ambient temperature range, relative humidity, applied power, shock and vibration range specified in Section 2, "Environmental Standards and Test Procedures" of NEMA TS1-1989, latest revision. Circuit breakers shall have an interrupt capacity of 5,000 amperes and insulation resistance of 100 megs at 500 VDC. 3) Radio Interference Suppressor. All cabinets shall be equipped with a radio interference suppressor installed on the load side of the circuit breaker. The suppressors shall be provided in series with the incoming AC power line before it is distributed to any equipment in the cabinet. The suppressor shall provide a minimum attenuation of 50 decibels over a frequency range of 200 kilocycles to 75 megacycles. The suppressor shall be hermetically sealed in a substantial metal case, filled with a suitable insulation compound. The suppressor terminals shall be nickel plated, brass studs of sufficient external length to provide space for connection of two appropriately sized conductors and shall be mounted so that the terminals cannot be turned in the case. The suppressors shall be designed for operation at the proper current rating as determined by the Contractor per the plans. The suppressors shall be designed for 120 volts, 60 Hertz, operation and shall be approved by UL and EIA

4 4) Power Line Surge Protection. Power line surge protectors shall be provided and installed as described below. (A) One surge protector shall be a 3 electrode gas tube type and shall have the following ratings: - Impulse Breakdown: Less than 1,000 volts in less than 0.1 microseconds at 10 Kilovolts/microsecond. - Standby Current: Less than one milliampere. - Striking Voltage: Limit any voltage greater than 212 volts dc. - Capable of withstanding 15 pulses of peak current, each of which will rise in 8 microseconds and fall in 20 microseconds to one half the peak voltage, at 3 minute intervals. Peak current rating shall be 20,000 amperes. The surge protector shall utilize both metal oxide varistors and silicon avalanche diodes to protect against transients having a single surge energy level up to 70 joules, voltage transients up to 6 kv, and current transients up to 6 ka. Protection shall be provided for line to neutral, line to ground and neutral to ground terminals. (B) The protectors shall have the following ratings: - Recurrent peak voltage 212 volts - Energy rating minimum 120 joules - Power dissipation - average 0.85 watt - Peak current for pulses for less than 6 microseconds 20,000 amperes - Standby current less than 1 milliampere. (5) Power Cable Input Junction Terminals. Power distribution blocks suitable for use as a power feed and junction points for two and three wire circuits shall be provided. The line side of each circuit shall be capable of handling two size 1/0 AWG conductors. The AC neutral and equipment ground wiring shall be electrically isolated from the line wiring by an insulation resistance of at least 10 megaohms when measured at the AC neutral. The AC neutral and equipment grounding wiring shall be color coded white and green respectively Right Side Panel. Each type 3, type 5 and type P cabinet shall include a fully wired loop input distribution panel to be mounted on the lower right hand inside wall when facing the front inside of the door opening of the cabinet. The Contractor shall provide a detailed layout for approval by the Engineer. This panel shall include the following components:

5 1) Power Distribution. If any 115 VAC power is needed on the right side panel, it shall be obtained from the power distribution terminal board located on the left side panel, which is fed from the equipment circuit breaker located on the left side panel. 2) Loop Surge Protection. Surge protection for incoming loop pairs shall be mounted on the right side panel. 3) Telephone Jack. An RJ-11 modular telephone jack for the voice communication equipment shall be provided at a convenient location on the right side panel. The jack shall be connected to the communications medium Back Panel. Each cabinet shall include a fully wired equipment panel to be mounted on the lower rear inside of the wall of the cabinet. The Contractor shall provide a detailed layout for approval by the Engineer. This panel shall include the following: 1) Detector Terminal Boards. 2) Other Electronic Equipment Terminals. The back panel shall be utilized to distribute and properly interconnect all cabinet wiring related to the specific complement of equipment called out on the plans. Each item of equipment including any furnished by the Department shall have its cable harness properly terminated at terminal boards on the back panel. All functions available at the equipment connector shall be carried in the connector cable harness to the terminal blocks from the power distribution panel mounted on the left side panel of the cabinet Wiring. All cabinet wiring where connected to terminal strips, flashers, relays, switches, radio interference suppressors, etc., shall be identified by the use of insulated pre-printed sleeving slipped over the wire before attachment of the lug or making the connection. The wire markers shall carry this legend in plain words with sufficient details so that a translating sheet will not be required. All wires shall be cut to the proper length before assembly. No wires shall be doubled back to take up slack. Harnesses to connectors shall be covered with "Chinese Finger" woven braid or braided. Cables shall be secured with nylon cable clamps. Service loops shall be provided to facilitate removal and replacement of assemblies, panels and modules. All electrical connections in the cabinet, including relays, flashers, terminal strips, etc., shall have sufficient clearance between each terminal and the cabinet to provide an adequate distance to prevent a leakage path or physical contact under stress. Where these distances

6 cannot be maintained, barriers must be provided. All equipment grounds shall run directly and independently to the ground bus. The lay of the interconnect cable between the components must be such that when the door is closed, it does not press against the cables or force the cables against the various components inside the cabinets. Sufficient length of cable shall be provided to easily reach the electronic equipment placed anywhere on the shelves. No wire shall be doubled back to take up slack. All wiring containing line voltage AC shall be routed and bundled separately and/or shielded from all low voltage, i.e., control circuits. All conductors and live terminals or parts, which could be hazardous to maintenance personnel, shall be covered with suitable insulating material. All conductors used on the cabinet wiring shall be No. 22 AWG or larger with a minimum of 19 strands. Conductors shall conform to MIL SPEC MIL-W , Type B or D. The insulation shall have a minimum thickness of 10 MILS. All wiring containing line voltage shall be a minimum size of No. 14 AWG Terminal Blocks. Terminal strips located on the panels shall be accessible to the extent that it shall not be necessary to remove the electronic equipment from the cabinet to make an inspection or connection. Terminal blocks shall be two position, multiple pole barrier type. Shorting bars shall be provided in each of the positions provided along with an integral marking strip. Terminal blocks shall be so arranged that they shall not upset the entrance, training and connection of incoming field conductors. All terminals shall be suitably identified by legends permanently affixed and attached to the terminal blocks. Not more than three (3) conductors shall be brought to any one terminal screw. No electrically energized components or connectors shall extend beyond the protection afforded by the barriers. All terminal blocks shall be located below the shelves. Terminals used for field connections shall secure conductors by means of a No nickel or cadmium plated brass binder head screw. Terminals used for interwiring connections, but not for field connections, shall secure conductors by means of a No nickel plated brass binder head screw. As a minimum, all connections to and from the electronic equipment shall terminate to an interwiring type block. These blocks will act as intermediate connection points for all electronic equipment Input/Output Cabinet Internal Grounding. The cabinet internal ground shall consist of one or more ground bus-bars permanently affixed to the cabinet and connected to the grounding electrode. Bare stranded No. 6 AWG copper wire shall be used between bus-bars and between the bus-bar and grounding electrode. Each copper ground bus-bar shall have a minimum of 20 connector points, each capable of securing at least one number 10 awg conductor. AC neutral and equipment ground wiring shall return to these bus-bars Transient Suppression. All DC relays, solenoids and holding coils shall have diodes across the coils for transient suppression

7 2.4 Mechanical Requirements Size and Construction. The cabinets shall be clean-cut in design and appearance and have minimum internal dimensions for the various type cabinets as follows: Type Depth Width Height /4" 30" 47 3/4" 5 26" 38 1/2" 75" P 26" 54" 54" The Contractor shall determine the suitability of the listed cabinet for the equipment complement shown at each field location on the plans. If required, a larger size cabinet shall be furnished and installed by the Contractor at no additional cost. Other than size, the selected cabinet shall fully meet the requirements of this Specification and shall be base mounted Ventilation. There shall be no opening on the sides of the cabinet nor the top portion of the cabinet roof. Cabinet ventilation shall consist of a filtered input, a fan and a screened exhaust. The intake vent opening shall be located on the lower portion of the cabinet door and shall be covered fully on the inside with a commercially available disposable 3 layer graded type filter. The exhaust area shall be provided on the underside of the cabinet roof overhang and shall be capable of venting a minimum of 100 CFM of air. The fan shall be designed to operate reliably over the temperature range of -30 to +165 F. The fan shall have a minimum capacity of 100 CFM. The fan thermostat shall be mounted near the top of the cabinet, insulated from the outside cabinet walls, and shall be a fixed type that turns on at 100 degrees Fahrenheit +/- 5 F and off at 85 F +/- 5 F. A push-to-test switch shall be provided to test the fan Lighting. A fluorescent light shall be mounted above the door of the cabinet. This light shall be provided with an on-off switch. This light shall be automatically activated when the cabinet door is opened, and turned off when the cabinet door is closed. The light shall be positioned to provide illumination to the face of the equipment in the cabinet. The lamp shall be positioned or shielded so as not to shine into a technician's eyes. Two momentary, pin-type door switches shall be installed in the cabinet or on the door. One switch shall be used to turn on the cabinet lights when the door is open. The remaining switch shall be wired in parallel to a terminal block for the purpose of detecting a cabinet intrusion condition by equipment mounted within the cabinet

8 2.4.4 Exterior Finish. The aluminum shall be carefully smoothed and the exterior shall be left in its unpainted natural color Serial Number. The cabinets shall be provided with a five-digit serial number unique to the manufacturer and this five-digit serial number shall be preceded by an assigned two-letter manufacturer's code. The entire identification code and number shall be either stamped on a metal plate which is riveted to the cabinet, stamped directly on the cabinet, or engraved on a metalized mylar plate that is epoxied to the cabinet on the upper right hand cabinet side wall Shelves. Adjustable shelves shall be provided in each cabinet as required to support the equipment as specified on the plans. Shelf adjustment shall be at 2 inch intervals in the vertical position. The shelves shall be positioned from the top of the cabinet in accordance with the actual equipment complement of the particular cabinet. The shelves shall be removable and capable of supporting the electronic equipment. There shall be a minimum of one (1) inch between the rear and front edge of the shelf and the back inside wall and door of the cabinet respectively to allow room for the equipment cables Mounting Hardware. All cabinets shall be furnished with the appropriate mounting plates, anchor bolts, and any other necessary hardware to mount the cabinet on a foundation Panels. All panels shall be designed to mount in the cabinet on mounting studs. It shall not be necessary to remove the panel to replace any panel mounted equipment. The panels shall support the following when they are mounted on the panel: Load Switches Relays Switches Miscellaneous Equipment - All Necessary Mounting Hardware 2.5 Surge Protection Protector and Cabinet Configuration. All ungrounded conductor wires entering or leaving an equipment cabinet shall be provided with surge protectors. The conductor leads and the surge protector leads shall be kept as short as possible with all conductor bends formed to the maximum possible radius. The protector units shall be located as near as possible (6 inches) to the entry or exit point, and as far as possible from any electrical equipment. The protector ground lead shall be connected directly to the ground bus. The surge protector utilized for AC power shall not dissipate any energy and shall not provide any series impedance during standby operation. The

9 unit shall return to its non-shunting mode after the passage of any surge and shall not allow the shunting of AC power Power Line Surge Protector. A power line surge protector shall be installed in each cabinet between both line conductors and equipment ground. The surge protector shall be as specified in Para of this Specification Signal Head Lamp Wires. All signal light interconnect conductors shall be provided with surge protectors at the equipment cabinet. The surge protector shall have the same characteristics as that specified for power lines Vehicle Detector Loop Lead-In. Each vehicle detector lead-in cable shall be provided with surge protection. In addition, the drain wire of the lead-in cable shall be connected to the cabinet ground bus Signal Wires. Each signal wire entering or leaving the cabinet shall have two-stage surge protection with the following characteristics: - Protector shall have input, output and ground connections; - Peak surge handling capability: 4,000 amps, 8 X 20 microsecond waveform; - Protector life: must withstand a minimum of fifty 2,000 amp, 8 X 20 waveform surges. - Response time: calculated element speed of 1 X seconds, measured speed of less than 20 nanoseconds. - Protector clamp voltage: shall be specified by the Contractor so as to be consistent with the equipment being protected and submitted to the Engineer for approval. 2.6 Environmental Design Requirements. The cabinets shall meet all of its functional requirements during and after subjection to any combination of the following requirements: - Ambient temperature range of -30 F to 165 F. - Temperature shock not to exceed 30 F per hour, during which the relative humidity shall not exceed 95%. - Relative humidity range not to exceed 95% over the temperature range of 40 F to 110 F. - Moisture condensation on all surfaces caused by temperature changes. 3.0 Construction Methods. 3.1 General. The equipment, design, and construction shall utilize the latest available techniques with a minimum number of different parts, subassemblies, circuits, cards, and modules to maximize standardization

10 and commonality. The equipment shall be designed for ease of maintenance. All component parts shall be readily accessible for inspection and maintenance. The only tools and test instruments required for maintenance by maintenance personnel shall be simple hand held tools, basic meters and oscilloscopes. 3.2 Electronic Components. All electronic components shall comply with Special Specification Item, "Electronic Components". 3.3 Mechanical Components. All external screws, nuts, and locking washers shall be stainless steel. No self tapping screws shall be used unless specifically approved by the Engineer. All parts shall be made of corrosion resistant material, such as plastic, stainless steel, aluminum or brass. All materials used in construction shall be resistant to fungus growth and moisture deterioration. Dissimilar metals shall be separated by an inert dielectric material. 3.4 Installation. The cabinet foundation shall be included as part of this bid Item. The cabinets shall be mounted on a concrete foundation as shown on the plans. The cabinet foundation shall be constructed in accordance with Article of the Item 656, "Foundations for Signs, Traffic Signals, and Roadway Illumination Assemblies". The cabinet shall be grounded to a five-eighths inch (minimum) copper clad ground rod 10 feet long driven into the ground and installed in the foundation Connection of Lead-In Cable. Connection of the detector lead-in cable to the detector terminal blocks shall be accomplished in the following manner: Each cable shall be properly dressed into position in accordance with the approved lead-in cable position on the panel (cables shall be bundled together and broken out by their position on the terminal boards). The cable shall be brought as close to the terminal points as possible and left floating. The cable shield shall be grounded after testing and in accordance with the loop detector manufacturers' specifications Connection of Miscellaneous Cables. Connection of signal wires, sign control wires and any other wires required to complete connections for an operational system shall be terminated on terminal boards. 3.5 Documentation Requirements. The documentation shall be in accordance with Special Specification Item, "Testing, Training, Documentation and Warranty," Section

11 3.6 Testing Requirements. The testing shall be in accordance with Special Specification Item, "Testing, Training, Documentation and Warranty," Sections 2.1 (excluding 2.1.3, and 2.1.5) 2.2, 2.4 and Measurement. This Item will be measured as each unit of the various types, furnished, installed and tested in accordance with this Special Specification. 5.0 Payment. The work performed and materials furnished as prescribed by this Item, measured as provided under "Measurement", will be paid for at the unit prices bid for "Cabinet (TY 3)", "Cabinet (TY 5)" and "Cabinet (TY P)". These prices shall be full compensation for all equipment described under this Item with all cables and connectors for cabinet foundation, documentation and testing and for furnishing all labor, materials, training and equipment necessary to complete the work