Regional Connector Transit Corridor Project
SECTION 26 05 19
INSULATED WIRES AND CABLES
PART 1 - GENERAL
1.1 DESCRIPTION
The Work specified in this Section consists of furnishing and installing wires and cables as specified and as indicated.
1.2 QUALITY CONTROL
Comply with Section 01 43 10, Project Quality Program Requirements - Design/Build.
1.3 REFERENCE STANDARDS
Comply with the latest issuance of each referenced standard and code.
A. American National Standards Institute (ANSI)
ANSI MC96.1 Temperature Measurement Thermocouples
B. American Society for Testing and Materials (ASTM)
ASTM B3 Soft or Annealed Copper Wire
C. Institute of Electrical and Electronics Engineers (IEEE)
IEEE 383 Type Test of Class 1E Electric Cables, Field Splices, and Connections for Nuclear Power Generating Stations
D. International Cable Engineers Association (ICEA)
E. National Electrical Manufacturers Association (NEMA)
ANSI/ICEA S-95-658 / NEMA WC 70 Non-shielded 0-2kV Cables
ANSI/ICEAS-96-659 / NEMA WC 71 Non-shielded 2001-5kV Cables
ANSI/ICEA S-93-639 / NEMA WC 74 Shielded Power Cable 5-46 kV
F. National Fire Protection Association (NFPA)
NFPA 70 National Electrical Code (NEC) NFPA 130 Standard for the Design of Fixed Guideway Transit Systems
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G. Underwriters Laboratories Inc. (UL)
UL 62 Flexible Cord and Fixture Wire
1.4 SUBMITTALS
Refer to Section 01 33 00, Submittals, for submittal procedures.
A. Manufacturer Product Data - Before installation of wire and cable, submit a list of proposed wires and cables to be provided for the electrical installation, identifying the typical application, usage and location of each submitted wire and cable data sheet. Submit the following information for each type and size of wire and cable:
1. Manufacturer of wire and cable.
2. Number and size of strands composing each conductor.
3. Conductor insulation composition and thickness in mils.
4. Average overall diameter of finished wire and cable.
5. Minimum insulation resistance in megohms per 1000 feet at 20°C ambient.
6. Jacket composition and thickness in mils.
7. Total number of conductors per cable.
8. Shield materials and thickness.
9. Conductor resistance and reactance in ohms per 1000 feet at 20°C ambient.
10. Conductor ampacity at 20°C ambient.
11. Bending radius of cable sizes larger than 1/0.
12. Cable weight per linear foot.
PART 2 - PRODUCTS
2.1 GENERAL REQUIREMENTS
A. Furnish cables, conduits, cable assemblies and support hardwares for feeders and branch circuits, as described in the following articles 2.2 to 2.11, as required to comply with Metro Design Criteria, the National Electrical Code (NEC) and the following requirements:
1. NFPA 130 rating, UL equipment listing and ASTM E136 non-combustible material requirements.
2. All conductors shall be insulated and shall be listed for wet locations. Insulation
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shall be moisture and heat-resistive type and shall conform to NFPA 70 cable insulation requirements.
3. Listed for resistance to the spread of fire and reduced smoke emissions per FT4/IEEE 1202 exposure requirements and peak release rate requirements of ANSI/UL 1685.
4. Branch circuit rating and listing requirements shall be based on the location of branch circuits and the type of loads supported as either life safety system related or non-life safety system related, as defined in Metro’s Life Safety Design Criteria, and applying the requirements of items 1 through 3 listed above. In general, life safety system equipment loads and associated branch circuiting are those supporting the operation of systems that provide the safe egress of patrons from stations and tunnels during a fire or other life safety related event. These systems typically include:
1) Emergency egress lighting.
2) Emergency ventilation.
3) Fire detection and protection systems.
4) Gas detection systems.
5) Emergency communications.
6) Emergency control systems.
2.2 CONDUCTORS
A. Type - ICEA stranded copper, soft drawn.
B. Insulation Rating: 600 volts.
2.3 CABLES
A. Non-Life Safety System Branch Circuit Cables:
1. Size 1/0 AWG and Smaller - NFPA 70 Type XHHW, cross-linked-thermosetting- polyethylene-insulated in accordance with NEMA WC70, WC71 and WC74 or NFPA 70 Type RHW, ethylene-propylene-rubber-insulated neoprene, Hypalon or CPE jacketed in accordance with NEMA WC 70. Compliant with NFPA 130 -5.4 and -6.33 Wiring Requirements.
2. Size 2/0 AWG and Larger - NFPA 70 Type RHW, ethylene-propylene-rubber- insulated, neoprene, Hypalon or Type CPE jacket and has better abrasion resistance when pulled through uncleaned conduits. Jacketing in accordance with NEMA WC 70. Compliant with NFPA 130 -5.4 and -6.33 Wiring Requirements.
3. Temperature ratings of cables - Not less than 90°C.
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4. Use multiple conductor cable for power applications, except receptacles and when otherwise indicated, and when installed in cable tray for sizes up to 4/0.
5. Control wires: Provide multi-conductor type cables, minimum size No. 14 AWG stranded copper, except wiring between CIC compartments, where a minimum of No. 16 stranded copper can be used.
6. Jacketed over insulation suitable for installation in cable tray.
B. Life Safety Branch Circuit Cables:
1. Compliant with NFPA 130 branch circuit rating and UL listing requirements.
2. 1 hour rated cables UL 2196 listed, or conductors included as part of a listed UL 2196 assembly, meeting the following requirements:
a. NFPA 70 Type RHW-2, copper conductor with cross-linked polyethylene (XLP) Insulation, jacketing NEMA WC 70 and RoHS/REACH compliant, or equivalent conductor, provided as part of an assembly tested and listed per UL 2196 listing requirements.
b. Pass flame propagating criteria of IEEE 383 and with minimum circuit time of five minutes in flame test of IEEE 383. Type test certificate is required with every shipment of cables.
c. Temperature ratings of cables - Not less than 90°C.
d. Cable assemblies capable of withstanding a sustained fire with a temperature of 250°C (482°F) for a minimum of one hour.
3. 2 hour rated cables UL 2196 listed, or conductors included as part of UL 2196 assembly, meeting the following requirements:
a. NFPA 70 type RHW-2, copper conductor with cross-linked polyethylene (XLP) insulation, jacketing NEMA WC 70 and RoHS/REACH compliant, or equivalent conductor, provided as part of an assembly tested and listed per UL 2196 listing requirements.
b. Pass flame propagating criteria of IEEE 383 and with minimum circuit time of five minutes in flame test of IEEE 383. Type test certificate is required with every shipment of cables.
c. Temperature ratings of cables - Not less than 90°C.
d. Cable assemblies capable of withstanding a sustained fire with a temperature of 250°C (482°F) for a minimum of two hours.
2.4 METAL CLAD CABLE
A. Metal clad cable with single or multiconductor configuration with ground wire compliant with NFPA 70 metal clad cable requirements.
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B. Conductor: Annealed copper Class B strand per ASTM B-3 & B-8.
C. Insulation Material: low smoke zero halogen polymer meeting listing requirements.
D. Armor: Continuously welded and corrugated copper.
E. 1 hour fire rated power cable.
F. Listed per UL 2196 requirements.
G. UL listed in accordance with NFPA 70 Type MC UL standard 1569.
H. UL listed for CT (cable tray) use.
2.5 MINERAL INSULATED CABLE
A. NFPA 70 Mineral Insulated (MI) cable type with single or multi-conductor configurations with ground wire compliant with NFPA 70 Article 332 requirements.
B. Conductor: Solid high conductivity copper
C. Insulation Material: Magnesium Oxide
D. Insulation Voltage Rating: 600 Volts
E. Cabling Rating: 90°C
F. Cable Sheath/Armor: Seamless soft-drawn copper
G. Listing: UL 2196 2 hour listed cable
2.6 FIXTURE WIRE
UL 62 with following additional requirements:
A. Type - SF-2 silicone rubber insulated.
B. Conductor - Stranded copper conductor 16 or larger as indicated.
2.7 BARE CONDUCTOR
ASTM B3, Class B stranded annealed soft-drawn copper conductor unless otherwise indicated, size as indicated. Bare conductor - Use for internal equipment ground connections only. Feeders and branch circuit ground conductors provided with insulation per article 2.2 and 2.3 with green colored jacket.
2.8 THERMOCOUPLE CABLE
Provide thermocouple cable with solid conductors meeting requirements of ANSI MC96.1 and of type compatible with thermocouple leads furnished with motor or temperature sensor. Thermocouple cable - Flame-retardant insulation, pair assembled with left-hand lay, flame-retardant outer jacket, with overall shield and UL listed as Type
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PLTC.
2.9 COLOR CODING OF CONDUCTORS
A. Color code of multiple conductor, 120 VAC control cables - Conform to NEMA WC 57 or as indicated.
B. Color code power supply cables and branch circuit conductors throughout secondary alternating current wiring system as follows: CONDUCTOR 208/120 VOLTS 480/277 VOLTS A Black Brown B Red Orange C Blue Yellow Neutral White White Ground (Communication) Green Green Ground (Power) Bare/Green Bare/Green C. Branch circuit phase conductors No. 10 and smaller, neutral and equipment ground conductors - Solid color insulation or solid color coating.
D. Phase conductors having colored tracers - Background color other than white or green.
E. Solid color coatings and tracers - A strongly adherent paint or dye non damaging to the insulation, will not fade, and which will not be obliterated by pulling into a conduit or raceway.
2.10 CABLE SUPPORTS AND FASTENERS
Use channel inserts. Refer to Section 26 05 10, Basic Electrical Materials and Methods.
2.11 CONDUCTOR BUNDLING STRAPS
A. Formed from self-extinguishing nylon having a temperature range of - 65°F to + 250°F.
B. Equip straps with locking hub or head with stainless steel locking barb on one end and a taper on other end.
C. Wire and cable ties for installation outdoors and in exposed locations - Ultraviolet- resistant nylon.
PART 3 - EXECUTION
3.1 GENERAL WIRE INSTALLATION
Provide a complete wire installation as indicated in these specifications and contract
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drawings for an operational electrical system compliant with the Metro design criteria requirements. Provide ample slack wire for motor loops, service connections and extensions. In outlet or junction boxes provided for installation of equipment by others, tape ends of wires and install blank covers. Do not splice wires or cables installed inside cable tray. Do not install receptacle and lighting cables in cable tray.
3.2 CABLE BENDING RADIUS
Do not bend cables to radii less than 12 times outer diameters, except where conditions make specified radius impracticable and shorter radii are permitted by NFPA 70 and NEMA WC 70, Appendix F.
3.3 BUNDLE CABLE AND CONDUCTORS
Bundle cable and conductors neatly and securely with nylon bundling straps located in branch circuit panelboards, cabinets, control boards, switchgears and motor control centers. Bundle single conductor cable for three-phase and single-phase circuits in cable trays.
3.4 MOTOR FEEDERS
Install motor feeders, service connections and extensions in accordance with referenced codes. Install motor feeder in liquid-tight flexible conduit 18 inches minimum length at motor conduit box as practical with Metro’s approval.
3.5 WIRE PULLING
A. Install wire and cable in conduit as indicated. Do not pull wiring into conduit until conduits and outlets have been thoroughly cleaned and swabbed. Do not use block and tackle or other mechanical means for pulling conductors smaller than No. 2 AWG in raceways.
B. Provide suitable installation equipment to prevent cutting and abrasion of conduits and wire during the pulling of feeders. Use lubricant and installation procedure as recommended by cable manufacturer. Pulling tension - Do not exceed manufacturer's recommendations.
C. Use masking or other means to prevent obliteration of cable identifications when solid color coating or colored tracers are used.
D. Pull cables, installed in a single conduit, together.
E. Do not exceed percentage of fill in conduit as specified in NFPA 70.
3.6 IDENTIFICATION
A. Provide nonmetallic fiberboard or plastic identification tags or pressure-sensitive labels designed for fastening to cables, feeders and power circuits in vaults, pull boxes, manholes, switchgears and at all terminations of cable or wire.
B. Stamp or print tags or labels to correspond with markings on Contract Drawings, or
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mark so feeder or cable can be identified.
C. If suspended type identification tags are provided, attach tags to slip-free plastic cable lacing units or to nylon bundling straps.
D. Refer to electrical identification requirements in this Section.
3.7 CONTINUITY TESTING
Continuity testing shall apply to wires and cables before termination, splicing or connections to loads. Megger test insulation resistance to ground of non-grounded conductor shall be minimum 10 megohms.
END OF SECTION
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