METRO WA NO CONTRACT NO.: RA , WORK AUTHORIZATION NO.: 08-01

Transcription

1 WA NO CONTRACT NO.: RA , WORK AUTHORIZATION NO.: December 2017 Huitt-Zollars, Inc. TBPE Firm Registration #F South Dairy Ashford, Suite 200 Houston, Texas TBPE Firm Registration #F Town and Country Blvd Suite 650 Houston, TX

2 WA NO CONTRACT NO.: RA , WORK AUTHORIZATION NO.: Owner Metropolitan Transit Authority Professional Seal Project Manager Shrader Engineering 750 Town and Country Blvd Suite 650 Houston, TX December 8, 2017 Project Team

3 WA NO LRT TRACTION POWER CONTRACT NO.: RA , WORK AUTHORIZATION NO.: DOCUMENT TABLE OF CONTENTS SECTION TITLE DIVISION 16 ELECTRICAL NO. OF PAGES Electrical Requirements Wire and Cable Raceway and Equipment Supports Bus Bar Enclosure Assembly... 5 END OF SECTION TOC -1 of 1

4 ELECTRICAL REQUIREMENTS SECTION ELECTRICAL REQUIREMENTS PART 1 GENERAL 1.01 SUMMARY A. Description This section describes general requirements for all electrical work REFERENCES A. Comply with applicable provisions of the following references: ANSI C.2 NECA NFPA 70 National Electrical Safety Code National Electrical Contractor's Association Standard of Installation Uniform Building Code National Fire Protection Association, National Electrical Code 1.03 GENERAL REQUIREMENTS A. Verify all dimensions before proceeding with the work. Identify and resolve all above ground conflicts with the existing utilities and structures before starting the work. B. All materials, equipment, and workmanship are subject to inspection at any time by METRO. C. Obtain all electrical permits and pay all associated fees. Electrical inspections may be observed by METRO. Schedule electrical inspections seven (7) days in advance with METRO and as required by the appropriate jurisdiction. D. Correct any work, materials, or equipment not in accordance with the Contract or found to be deficient or defective at no additional cost to METRO. E. Create outage plan and submit to METRO for approval and coordination prior to any work being done and prior to any other submittals LICENSING AND CERTIFICATION A. Perform all installation work by licensed electricians. R

5 ELECTRICAL REQUIREMENTS 1.05 CONTRACT DOCUMENTS A. Design Modifications 1. Perform design modifications only with prior written approval from METRO. B. Intent of Contract Drawings 1. The Contract Drawings do not indicate all fittings, hardware or appurtenances required for a complete operating installation. 2. Wiring diagrams are not intended to indicate the exact course of raceways or exact location of outlets. Raceway locations are subject to revision as may be necessary at the time of installation. Location of undimensioned features are subject to METRO approval. 3. One-line diagrams, feeder diagrams and riser diagrams are schematic and do not show physical arrangement of equipment DELIVERY, STORAGE AND HANDLING A. Deliver all products to the site in the manufacturer's original packing. B. Store all products in an environment recommended by the manufacturer of the product. C. Handle all products as recommended by the manufacturer of the product PROTECTION DURING CONSTRUCTION A. Provide protection of products against loss or damage. B. Protect products from the effects of weather. Prior to installation, store items in clean, dry, indoor locations. Store items subject to corrosion and items containing insulation, such as conductors, in a clean, dry, heated, indoor location. C. Following installation, protect products from corrosion, dust, dirt, physical damage and the effects of moisture RECORD DRAWINGS A. Keep records of all site modifications to produce accurate Record Drawings. R

6 ELECTRICAL REQUIREMENTS PART 2 PRODUCTS 2.01 GENERAL A. Provide only new and unused materials and equipment. B. Provide materials and equipment that are standard products of manufacturers regularly engaged in the production of such materials and equipment. Provide the manufacturer's latest standard design that conforms to this Specification. C. Provide materials and equipment which will fit within the space provided. D. Provide electrical equipment and products listed and labeled by an electrical safety testing laboratory acceptable to METRO. E. Where two or more units of the same class of material or equipment are required, provide products of a single manufacturer. Incidental component parts of equipment are not required to be the products of the same manufacturer. F. Where finish of materials and equipment is referenced or stated, provide the finish exactly as shown or specified. Where no finish or color is listed, provide the manufacturer's standard finish, suitable for the environment intended, and as approved by METRO. G. Provide materials and equipment designed to ensure satisfactory operation and operational life in the environmental conditions of the Project locale SEISMIC REQUIREMENTS NOT APPLICABLE PART 3 EXECUTION 3.01 GENERAL A. Locate and install all equipment to be readily accessible for operation and maintenance. METRO reserves the right to require minor changes in location of raceways or equipment without incurring any additional costs or charges. B. Install raceway stub-ups in accordance with field conditions and equipment Shop Drawings. C. Locate wall switches, outlets, and lighting to suit field conditions. D. Install equipment using procedures defined in NECA Standard of Installation. R

7 ELECTRICAL REQUIREMENTS E. Not Used F. Energize any space heaters in equipment or provide temporary heat. G. Cap raceway runs with seals manufactured by the raceway manufacturer. H. Keep openings in boxes or equipment closed during construction TESTING A. Perform testing as specified in each Section of the Specification. END OF SECTION R

8 WIRE AND CABLE SECTION WIRE AND CABLE PART 1 GENERAL 1.01 SUMMARY A. Description 1. This work includes providing wires and cables and associated splices and terminations REFERENCES A. Comply with applicable provisions of the following references: ASTM B3 ASTM B8 ASTM B173 ASTM B189 ASTM B248 ASTM B249 ASTM D 470 ASTM D ASTM D 790M ASTM D 1654 ASTM D 2240 Soft or Annealed Copper Wire Concentric-lay-stranded copper conductors, hard, medium-hard, or soft Rope-Lay-Stranded Copper Conductors Having Concentric- Stranded Members for Electrical Conductors Lead-Coated and Lead-Alloy-Coated Soft Copper Wire for Electrical Purposes General Requirements for Wrought Copper and Copper Alloy Plate, Sheet, Strips and Rolled Bar General Requirements for Wrought Copper and Copper Alloy Road, Bar and Shapes Standard Method for Testing Crosslinked Insulations and Jackets for Wire and Cable Heavy-Duty black polychlorene jacket for wire and cable Test for Flexural Properties of Plastics and Electrical Insulating Materials Standard Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments. Standard Test Method for Rubber Property-Durometer Hardness R

9 WIRE AND CABLE ASTM D 2802 IEEE Std 383 NEMA WC 3 Ozone-Resistant Ethylene-Propylene Rubber Insulation for Wire and Cable Standard for Type Test of Class 1E Electrical Cables, Field Splices and Connections for Nuclear Power Generating Stations Rubber-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy, also ICEA S NEMA WC 5 Thermoplastic-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy, also ICEA S NEMA WC 7 Standard to Cross-Linked Thermosetting Polyethylene Insulated Wire and Cable for Transmission and Distribution of Electrical Energy, also ICEA S NEMA WC 8 Ethylene-Propylene-Rubber-Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy, also ICEA A NFPA 70 National Fire Protection Association, National Electrical Code UL FR-1 Flame Tests 1.03 SUBMITTALS A. Submit manufacturer's certified test data. Include evidence that all wires and cables conform to the requirements of the specified standards and this Specification. B. Submit product data on the following items: 1. Substation wires and cables. 2. DC positive and negative cable. 3. Transfer trip control cable. 4. Communications cable. 5. Control and power cables. 6. Splicing and termination materials. R

10 WIRE AND CABLE C. Include in product information for each type and size of wire and cable the following: 1. Manufacturer of the wire and cable. 2. Cable composition, number and size of strands composing each conductor. 3. Conductor insulation and jacket composition and thickness. 4. Overall diameter, net and copper weight of finished wire and cable. 5. Minimum bend diameter. 6. Conductor ampacity assuming one and three current-carrying conductors in a raceway. a. Above ground cable and wire. Ampacity at 40EC ambient air temperature and 80EC conductor temperature. b. Underground cable and wire. Ampacity at 20EC ambient earth temperature and 90EC conductor temperature. 7. Flame retardation characteristics. D. Submit the wire/terminal designation system to METRO for approval. Coordinate all electrical circuits in the equipment in a unified system approach. PART 2 PRODUCTS 2.01 LOW VOLTAGE WIRE AND CABLE A. Use minimum number of wire and cable types and sizes. Select wire and cable sizes and insulation based on the current carrying capacity, voltage drop, mechanical strength, and flexibility requirements. B. Conductors 1. Use wires and cable conductors manufactured of soft annealed, tinned copper conductors. 2. Use type XHHW insulation for wires and cables completely contained in raceway and boxes in dry locations. R

11 WIRE AND CABLE 3. Use type XHHW-2 insulation for wires and cables installed in underground raceways or wet locations. 4. Use conductor ampacities as listed in the National Electric Code (NFPA 70) Article and the Allowable Ampacity tables, 90EC column. Where more than three conductors are routed in one raceway, derate the ampacities as detailed by Note 8 to the Ampacity Tables. 5. Minimum size of conductors is shown in Table Table Conductor Sizes Circuit Type Minimum Conductor Size Strands AC auxiliary power supply No. 6 AWG 19-7/ DC auxiliary power supply No. 6 AWG 19-7/ High current or long length control circuits No. 10 AWG 105/ Low current or short length No. 12 AWG 65/ control circuits Circuit Type Minimum Conductor Size Strands Voltage control circuits No. 14 AWG 41/ Instrumentation and transducer circuits No. 16 AWG 26/ The use of solid wire is prohibited. C. Insulation and Shielding 1. Use wires and cables flame tested to UL VW-1 or IEEE 383 with 600 V, 90EC ratings. 2. Provide wire and cable for control and instrumentation with flame-retardant, thermosetting, flexible, heat, moisture, and abrasion resistant ethylene-propylene-rubber (EPR) insulation in accordance with NEMA WC 8/ICEA S and ASTM D Provide shielded instrumentation cables with aluminum/polyester tape using tinned copper drain applied helically over pairs of conductors and over the entire cable core. R

12 WIRE AND CABLE 4. Provide wires for DC circuits at traction voltage insulated at 15 kv DC. 5. Furnish all cables with flame retardant, low smoke, non-halogen polyolefin jacket in accordance with NEMA WC 8/ICEA S D. Terminations 1. Terminate all conductors by pre-insulated, ring tongue terminals. Use of spade or hook tongue terminals is prohibited. Use terminals manufactured of fine grade, high conductivity copper, tin plated to resist corrosion. 2. Use long-barrel type terminals enabling installation of two crimps per terminal. Provide the barrel with serrations to ensure maximum contact and tensile strength after crimping. Insulate the terminals with high strength insulating sleeves. 3. Provide terminals manufactured by acceptable manufacturer with a comprehensive line of terminals and application tools AC POWER CABLES A. Substations 1. The electrical power utility will furnish, install and connect AC cables from their facility to the traction power substations DC POSITIVE AND NEGATIVE POWER CABLES A. Furnish all positive feeders and negative return cables. Provide the positive feeders to deliver traction power from the DC switchgear to the overhead distribution system and the negative cables to return power from the rails to the negative return assembly. 1. Size all cables to carry the design loads, overloads and fault currents without exceeding allowable cable temperatures. Minimum conductor sizes are shown in Table R

13 WIRE AND CABLE Table DC Feeder Cables Feeder Type Minimum Cable Size Conductor Material Positive Feeder Cables for Each Feeder Circuit 1,000 MCM Equivalent Copper OCS Feeder Cable 444 MCM Equivalent Copper Negative Return Cables for Each Track 2,000 MCM Equivalent Copper 2. Use cables suitable for installation in underground ductbanks. B. Manufacturer 1. Southwire 2. or approved equal C. Conductors 1. Use all power cable conductors manufactured of stranded, soft annealed, tinned copper conductors in accordance with ASTM B8 and ASTM B33. D. Insulation and Jacket 1. Furnish cables with ethylene propylene rubber (EPR) insulation rated at 5,000 VAC, 105 C continuous operating temperature, 140 C emergency rating, and 250 C short circuit rating. Provide insulation complying with ICEA S /NEMA WC 74, ICEA S /NEMA WC70, and ASTM D2802, B3, and B8. 2. Furnish cables with heavy duty flame retardant, polyethylene, polyvinyl chloride (PVC), neoprene, or hypalon jacket in accordance with NEMA WC 8/ICEA S In addition, provide cable sheath using compound listed by Underwriters Laboratories. 3. Use cables with durable markings every three (3) feet, including the name of the manufacturer, voltage rating, type and size. R

14 WIRE AND CABLE E. Terminations 1. Terminate cables on the outside take-off structures and in the switchgear cubicles by heat-shrinkable modular terminators. Use terminators that provide an environment-proof hermetic seal and stress relief for the terminated cables CABLE TERMINATIONS A. For termination No. 10 AWG and smaller, use pre-insulated solderless type terminals, such as Thomas and Betts "Stakon" ring tongue, Panduit, or approved equal. B. For terminations No. 8 AWG and larger, use tin or silver plated copper compression type lugs with NEMA bolt hole patterns as manufactured by Thomas and Betts, Burndy, or approved equal C. Use of aluminum or aluminum alloy terminals is prohibited POWER CABLE SPLICES A. For splices use tin or silver plated copper compression sleeves as manufactured by Thomas and Betts, Burndy, or approved equal. B. Provide insulation for above-ground splices and taps using heat shrink polyolefin as manufactured by Thomas and Betts, Raychem, or approved equal. C. For 1000 KCMIL, 600V cable splices, use splice model 3M, M-30 METRO Splice. D. Provide all splices rated at the cable voltage and current rating. PART 3 EXECUTION 3.01 GENERAL INSTALLATION REQUIREMENTS A. Inspect all wire and cable for damage prior to installation. Provide wires and cables free of kinks, insulation damage, and nicked strands. Installation of damaged wire and cable is prohibited. B. Protect wires and cables from damage during all phases of manufacture, transportation, storage, and construction. C. Install wire and cable of the sizes and types specified in accordance with the National Electric Code (NFPA 70) Articles 300, 310 and 318. R

15 WIRE AND CABLE D. Provide sufficient length of cable in the manholes, handholes, and boxes to enable future re- termination and re-splicing LOW VOLTAGE WIRE AND CABLE A. Installation 1. Design the layout of wires and cables in advance of equipment manufacture to avoid wiring congestion. Install wiring with identical arrangement and location in each cubicle of the same type. Provide all wiring connections to be continuous, without splices or taps. 2. Support wires bundled into groups at intervals not greater than eighteen inches (18"). Protect wire bundles at each support point against mechanical crushing and abrasion. Use standard wire/cable tying devices to secure wiring to the equipment cubicle walls and partitions. 3. Eliminate all sharp edges, burrs or projections in cable trays and conduits, which may damage the wire or cable insulation. Use of trays and conduits as equipment grounding conductors is prohibited. Clamp securely wiring in trays at entrance and exit points using a compression type neoprene grommets. 4. Arrange wiring of door mounted devices so that conductors are being twisted over some length rather than bent at one point as the cubicle door is being opened and closed. Avoid chafing or rubbing of wires and cables against any movable part of the equipment and avoid routing in the vicinity of heat-generating equipment. B. Terminations 1. Strip insulation, cut wire, tin, solder and attach terminations in strict accordance with manufacturer procedures. Use appropriate tools in good working condition. 2. When removing insulation from the conductor, avoid cutting, nicking, scraping or otherwise damaging the wire strands. Install wire to allow for sufficient slack at equipment terminals. Provide for two additional reterminations without applying any tension. 3. Use crimping tools making two crimps per terminal. One crimp shall attach the termination to the conductor and the other crimp shall grip the wire insulation. Install terminals using ratchet-type crimping tools made by or approved by the termination manufacturer. Once the ratchet is engaged, the crimping tool shall not open until both crimps are completed. R

16 WIRE AND CABLE 4. Connect all conductors to terminal blocks. Use terminal blocks manufactured from nylon or resin-based insulating material having good insulating properties. Provide terminal blocks having screw-type compression terminals with brass screws and flat brass washers. The screws and washers may also be made of corrosion-resistant plated steel. Provide adequate space to permit connecting the wire terminals with standard tools. Torque all terminals properly to assure sound connections. Connect a maximum of two terminals to any one screw. Provide a minimum of 25% spare terminals on each terminal block. C. Splices 1. Wire and cable splices are prohibited in the LRVs and system facilities. D. Circuit Separation 1. Avoid bundling together AC and DC conductors. Avoid bundling together conductors operating at potentials differing by 50 V or more. Place the conductors in separate conduits and terminate in separate junction boxes or on separate terminal blocks. 2. Separate wiring connected to transients-generating apparatus, such as trip coils, from wiring carrying signals to, from, or between semiconductor circuits. In cases in which adequate physical separation is not practical, use shielded wire or cable of approved design. Ground cable shielding. E. Marking 1. Identify all wires and terminal block screw positions with white or yellow, permanent, numeric, or alpha-numeric markers. Use rub and oil-proof markings, indented or engraved in black. Use slide-on sleeve wire markers and individual tag terminal markers fitting into the terminal blocks. 2. Designate and mark each wire and terminal blocks individually in accordance with approved Shop Drawings. F. Color Coding 1. Code all color coded wiring as follows: a. Systems operating at 120V/240V: A-phase black, B-phase red, C-phase blue, neutral white, ground green. R

17 WIRE AND CABLE 3.03 CABLE IN RACEWAYS A. Installation 1. Install all cables in strict accordance with the cable manufacturer recommendations. 2. Install substation interior wiring into metallic tubing or un-coated galvanized rigid steel conduit. For equipment requiring flexible connections use corrosion resistant flexible metal conduit. 3. Prevent cables resting or pressing against sharp edges or corners. 4. Pull wire into raceway until all bushings are installed and raceway terminations are completed. Avoid wire extending out of raceway stubs or uncompleted raceways. 5. Pull cable into buried raceways by applying a steady, continuous pulling tension on the cable. Record the pulling tension. In no case exceed the manufacturer's recommendation for the size and type of cable being installed. 6. Do not damage cables in any way during installation. Protect cables from cuts and sheath abrasion at the raceway entrance by the use of shields or bell entrance fittings. Do not pull conductors over the edges of boxes or raceways. 7. Provide pulling compounds and cable lubricants, if necessary, to be nonpetroleum, non- conductive, non-hygroscopic, non-odorous, and not attracting vermin. Clean residue from conductors, boxes and equipment after the pull is completed. Use commercially available pulling compounds or cable lubricants approved by the cable manufacturer. 8. Support cables passing through manholes or splicing chambers to allow easy access to the cables. Lay cables in place with sufficient slack at the bends so that cables clear the inside bend surface of the raceway, thereby preventing crushing of insulation. Install cables with sufficient slack for future cable work. 9. Support vertical cables by appropriately sized cable grip supports. B. Terminations 1. Terminate all cables in accordance with the cable manufacturer's recommendation. R

18 WIRE AND CABLE a. Connect cable to busbars, circuit breakers, and disconnect switches with approved long barrel, aerial bolt-on type lugs. b. Connect cable to overhead conductors by appropriately sized clamps. c. Avoid connection of dissimilar metals. 2. Bolt all traction power and grounding connections by two ½ inch bolts, minimum. Provide each bolt with a round washer under the bolt head and a bellville washer under the nut. Torque the bolts to between 50 and 70 ft.- lbs. These connections include, but are not limited to the following: a. Busbar connections such as busbar extensions, circuit breaker connections, and busbar taps. b. Grounding busbar connections. c. Power cable connections to disconnect switches. d. Surge arrester connections. 3. Provide all cable terminations with ampacity, thermal rating, and mechanical strength at least equal to the ampacity, thermal rating, and breaking strength of the cable. 4. Make terminations or taps in handholes and manholes or underground terminations watertight with epoxy resin type splicing kits, "Scotchcast" or approved equal. 5. Protect from moisture all cables pulled for later connections. C. Splices and Tees 1. Install all splices and tees in accordance to cable manufacturer procedures. Install splices only in manholes or splicing chambers. Pulling splices into conduits is prohibited. Insulate and protect splices against moisture. 2. Provide all cable splices and tees with ampacity, thermal rating, conductivity and mechanical strength at least equal to the ampacity, thermal rating, conductivity and mechanical strength of the cable. 3. Test each splice and tee. D. Circuit Separation 1. Avoid installing power and control cables in the same ductbank and in the same manholes and handholes. R

19 WIRE AND CABLE E. Identification 1. Identify all cables entering or exiting substations, manholes and splicing chambers by a stamped metallic tag indicating circuit number and voltage. 2. Identify cables in accordance with approved Shop Drawings. F. Flameproofing 3.04 TESTS 1. Treat all cables in manholes or splicing chambers and all cables in vertical conduits with a suitable flame proofing application. 2. Provide firestops for protection against propagation of flame in compliance with the requirements of NFPA 130. A. Perform tests for dielectric strength and electrical continuity on each cable tap. END OF SECTION R

20 RACEWAY AND EQUIPMENT SUPPORTS SECTION RACEWAY AND EQUIPMENT SUPPORTS PART 1 GENERAL 1.01 SUMMARY A. Description 1. This work includes providing complete raceway and equipment supports REFERENCES A. Comply with applicable provisions of the following references: ANSI C80.1 ANSI C80.4 MA-2 MA-3 Specification for Fittings for Rigid Steel Conduit, Zinc Coated Specification for Fittings for Rigid Metal Conduit and Electrical Metallic Tubing Inspection Manual for Hot-Dipped Galvanized Products, Hot-Dip Galvanized Coating The Design of Products to Be Hot-Dipped After Fabrication 1.03 SUBMITTALS A. Submit Product Data on the following items: 1. Raceway support system, including clamps and fittings. 2. Concrete expansion anchors. PART 2 PRODUCTS 2.01 RACEWAY SUPPORTS A. Provide hot-dip galvanized heavy gauge steel or malleable iron raceway clamps. B. Provide galvanized steel hanger rods. Select rods with minimum diameter of d-inch. R

21 RACEWAY AND EQUIPMENT SUPPORTS C. Provide hot-dip galvanized steel channels, channel fittings, clamps, and accessories. Use channels 14 gauge, minimum D. Provide raceway rack channels, clamps, and accessories manufactured from hot-dip galvanized steel of appropriate gauge for the application, 12 gauge minimum. Aluminum, or light gauge or strength metals or materials are prohibited. E. Acceptable manufacturers: Unistrut, Powerstrut, B-Line, O-Strut, or approved equal ANCHORS A. Provide anchors with sufficient strength to support four times the load. Use the following anchors: 1. Hollow Masonry: Toggle bolt type expansion anchors. 2. Solid Masonry: Concrete expansion anchors. 3. Metal Surfaces: Machine screws, bolts, or welded studs. 4. Wood Surfaces: Wood screws or lag bolts. 5. Concrete Surfaces: Use wedge type concrete expansion anchors. B. Acceptable suppliers are: Phillips Red-Head, Hilti, or approved equal. C. Power driven studs are prohibited CONCRETE INSERTS A. Provide continuous slot-channel inserts fabricated from 12 gauge steel, rated for loads of 2,400 pounds per foot B. Provide spot inserts rated for a load of 1,000 pounds or greater each. C. Use hot-dip galvanized finish. D. Acceptable manufacturers: Unistrut, Allied Powerstrut or approved equal FASTENERS AND HARDWARE A. Use only corrosion resistant fasteners, protected by hot-dip galvanizing after fabrication. Un- plated steel is prohibited. B. Provide stainless steel fasteners in manholes, handholes, or splice boxes. R

22 RACEWAY AND EQUIPMENT SUPPORTS C. Plated steel fasteners may be used indoors and in dry locations only. PART 3 EXECUTION 3.01 INSTALLATION OF RACEWAY RACKS A. Support multiple runs of exposed raceway on raceway racks. Construct racks from steel channels, using raceway clamps and fittings as per rack manufacturer s recommendation. Use trapeze style raceway racks supported by d- or ½-inch rods minimum, and concrete expansion anchors. B. Provide raceway racks with a minimum of 25 percent spare capacity. C. Raceway racks may be used for support of vertical or horizontal raceway runs. D. Where raceways 2-inch or larger are supported by racks, use heavy duty channel, clamps and accessories. E. For raceway racks mounted vertically, tack weld the top leg of each raceway clamp to strut and paint with zinc-rich primer INSTALLATION OF CONCRETE EXPANSION ANCHORS A. Drive holes for anchors perpendicular to the concrete surface, and install anchors in accordance with manufacturer's instructions. B. Avoid installing anchors closer than six times the diameter of the hole, center to center INSTALLATION OF CONCRETE INSERTS A. Install concrete anchor inserts supporting raceway and equipment in concrete. B. METRO will inspect the inserts before concrete is poured. Notify METRO seven (7) days in advance of pouring, and make any changes in the placement as directed by METRO INSTALLATION OF FASTENERS AND HARDWARE A. Install fasteners and hardware suitable for the intended environment and use. Replace corroding fasteners at no additional cost to METRO. END OF SECTION R

23 BUS BAR ENCLOSURE ASSEMBLY SECTION BUS BAR ENCLOSURE ASSEMBLY PART 1 GENERAL 1.01 DESCRIPTION A. This Section specifies the requirements for providing dual bus bar enclosures for the purposes of a 750VDC light rail transit system QUALITY ASSURANCE A Reference Standards Applicable to the Section: 1. American Society for Testing and Materials (ASTM) a. A 167: Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate b. A 480: Specification for General Requirements for Flat- Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip c. B 187/187M: Specification for Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar and Shapes 2. National Electrical Code (NEC) 3. National Electrical Safety Code (NESC) 4. National Electrical Manufacturers Association (NEMA) a. NEMA 250: Enclosures for Electrical Equipment 5. Underwriters Laboratories (UL) 1.03 SUBMITTALS a. UL 50 - Enclosures for Electrical Equipment A. In accordance with Section Shop Drawings, Product Data, Samples, and Record Documents of these specifications, the following shall be submitted: 1. Manufacturer s product data. 2. Certificate(s) of compliance. R

24 BUS BAR ENCLOSURE ASSEMBLY PART 2 PRODUCTS 2.01 FIBERGLASS ENCLOSED NEGATIVE BUS ASSEMBLY A. General 1. Basis of Design: The basis of design for this particular application is the Normandy Machine Company (NMC) Powerswitch, Inc. Dual Bus Enclosure Assembly product. The vendor address is 815 E. Cherry Street, Troy, MO, Contact person shall be Scott Baumli at or scott@normandymachine.com. B. Material Type and Ratings 1. The assembly shall consist of two 6000 amp, 1000 Volt DC copper bus assemblies mounted on standoff insulators in a weatherproof NEMA 3R fiberglass enclosure suitable for pad mounting. The enclosure shall have a full height fiberglass barrier inside with a bus assembly mounted inline on each side of the barrier. C. Bus Assembly Components 1. All current carrying parts shall be made from 98% conductivity alloy 110 bus bar copper. Each bus shall have 17/32 inch diameter holes arranged to accommodate four NEMA Standard 4 Hole Cable Lugs. All contact surfaces shall be silver plated. 2. Each buss shall be mounted on two high strength fiberglass A- Frame insulators. Each insulator shall have a voltage rating of 5000 volts, a cantilever strength of at least 3600 inch lbs. and a tensile strength of 2500 lbs. This insulator shall be #GINS as is available from The Gund Company, 2121 Walton Road, St. Louis, MO or equal. D. Negative Bus Enclosure 1. The bus assemblies shall be enclosed in a two gang NEMA 3R weatherproof, ventilated, fiberglass enclosure suitable for outdoor pad mounting and shall be strong enough to support the combined weight of the bus assemblies and connecting cables. R

25 BUS BAR ENCLOSURE ASSEMBLY 2. The enclosure shall be made from 1/4 inch thick fiberglass reinforced polyester resin meeting the requirements for a UL 94V-1 flammability rating. Exterior surfaces shall have a 20 mil. thick ANSI -61 light gray color gel coat. Interior color shall be white. All internal metal parts extending outside the enclosure shall be insulated or shielded. 3. Each enclosure shall have a full height fiberglass barrier fastened in the center to form two separate compartments. Each compartment shall be accessible with separate doors. 4. The enclosure doors shall be fastened to the enclosure sides with a continuous stainless steel hinge the full length of the door. Door opening shall be a minimum of 170. Each door shall have an insulated three point latch with provision to allow locking the door closed. Each door shall have a UV, ozone, salt water, and oil resistant, neoprene rubber door gasket. The length of each gasket shall be continuous without splices and be suitable for use in a temperature between +120 C and - 40 C. 5. Each enclosure shall have two drip proof fiberglass stainless steel vents on each side, one low and one high. Enclosure doors shall have an engraved warning plate with legends, DANGER HIGH VOLTAGE attached with nylon screws. H. Production Tests 1. Production tests shall be performed on each assembly to check the quality and uniformity of workmanship. Production tests shall include the following: a. Dielectric Withstand Test: Each assembly shall withstand an applied voltage of two times rated voltage plus 1000 volts, (3000 VDC), for one minute with no sign of flash over or leakage between each bus assembly or between each bus and any external metal parts. R

26 BUS BAR ENCLOSURE ASSEMBLY PART 3 EXECUTION 3.01 Installation A. Install Dual Bus Bar Enclosure Assembly in accordance with manufacturer s written instructions and the applicable requirements of NFPA 70 (NEC). B. Secure enclosures rigidly to the structure upon which they are being mounted. C. Provide sufficient accessibility and clearance for maintenance access. D. Provide complete testing Training A. Provide minimum two (2) hours of hands-on instruction for Owner s staff, to be conducted at project site by system manufacturer s representative, at no additional cost to Owner. Training to include proper positioning and termination of cables onto bus bar. B. Provide minimum two (2) weeks notice to Engineer and Owner before conducting training. Coordinate list of trainees with Owner Warranty A. Contractor shall provide full 1-year service warranty on all items installed and shall include all labor and materials required to repair or replace equipment and/or components that are defective or malfunctioning. Included under this warranty shall be all equipment, devices, hardware, and programming. B. This warranty shall begin on date of written Final Acceptance of the systems to be executed as required at no additional cost to Owner. C. Contractor s warranty shall also guarantee 24-hour service response time and shall provide labor, work, and materials as necessary to maintain LRT System operation when replacement parts are on order. In no case shall LRT System be out of service for more than 24 hours from time Owner calls for warranty service. This shall be provided at no additional cost to the Owner. All equipment and materials installed shall have full warranty from Manufacturer that guarantees equipment is rated for harsh industrial environment in which it is installed. R

27 BUS BAR ENCLOSURE ASSEMBLY D. Where Manufacturer s products fail prematurely, Manufacturer shall be fully responsible for new replacement and shall not have the option of declaring that failures were caused by environmental conditions and its effect on the product. E. Contractor is fully responsible for assuring that the Product Manufacturers are aware of this condition and that warranty statement is included in shop drawing submittals. Failure to do so will be at the Contractor s expense and at no additional cost to the Owner. F. All critical warranted repairs shall be made within 24 hours of receipt of required parts from Manufacturer with reasonable delivery time of overnight shipping. Any repairs not completed within 5 working days from the date of notice are subject to Owner making other arrangements for repair and back charging Contractor. This requirement is a condition of this contract. G. Where equipment or controls problems remain unresolved by Contractor beyond a reasonable time, a Factory Technician shall be provided on-site to take any corrective actions necessary to put equipment or controls in operating order. Owner and Engineer reserve the right to determine a reasonable time for corrective action by Contractor. END OF SECTION R