Section 721 — Electrical and Illumination Material
721.01Electrical Material.
(a)Conduit. Conform to the following:
(1)Nonmetallic conduit , duct , couplers, connectors, and fittings. For above ground and underground use without concrete encasement, provide rigid PVC, heavy wall conduit conforming to UL 651, Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings . Conform to ASTM D2564 for solvent cement to join conduit.
(2)Metallic conduit, duct, couplers, connectors, f ittings , and nipples. Provide rigid galvanized steel conduit conforming to UL 6, Electrical Rigid Metal Conduit - Steel . Provide rigid, full -mass sherardized or galvanized threaded fittings.
(3)Coated Metallic conduit, duct, couplers, connectors, fittings, an d nipples. Provide rigid galvanized steel conduit conforming to UL 6, Electrical Rigid Metal Conduit - Steel . Uniformly coat the conduit on the outside with an asphalt mastic conforming to AASHTO M 243 or a 20- mil PVC coating. Provide rigid, full- mass sher ardized or galvanized threaded fittings.
(4)Flexible metallic conduit. Provide a watertight metallic conduit conforming to UL 360, Liquid-t ight Flexible Metal Conduit. Provide insulated throat, grounding, malleable iron watertight fittings.
(5)Flexible nonmetallic conduit. Provide a watertight non metallic conduit conforming to UL 1660, Liquid-t ight Flexible Nonmetallic Conduit. Provide insulated throat, grounding, malleable iron watertight fittings.
(6)Conduit bodies, boxes, and fittings. Provide watertight, galvanized steel conforming to UL 514B, Conduit, Tubing, and Cable Fittings .
(b)Pull boxes, frames, and covers. Fabricate boxes formed in concrete with cast iron or welded sheet steel having a minimum thickness of 0.188 inch. Galvanize, inside and out, according to AASHTO M 232.
(c)Wire and cable.
(1)Lighting. Provide either ozone resistant cross -linked polyethylene (XLP) or PVC insulated cable, with or without a nylon jacket conforming to the following:
(a)Polyethylene. Insulated Cable Engineers Association (ICEA) S -95-658/NEMA WC70, Non-Shielded Power Cables Rated 2000 V or Less, ICEA S -96-659/NEMA WC71, Non- Shielded Power Cables Rated 2001-5000 V, ICEA S -93-639/NEMA WC74, Shielded Power Cable 5,000-46,000 V; or (b) PVC. UL 83, Thermoplastic- Insulated Wires and Cables.
(2)Electrical. Provide soft drawn or annealed copper conductors conforming to ASTM B3 and stranding conforming to ASTM B8. Provide stranded wire for #10 AWG and larger. Provide #6 AWG minimum solid copper ground wires. Provide type thermoplastic high -heat resistant, nylon -coated wire (THHN) or thermoplastic heat and water -resistant nylon- coated (THWN) #14 AWG, stranded, single -conductor loop wire according to the IMSA Specification 51 -7. Provide type THHN or THWN, stranded, single -conductor lead- in cable according to IMSA Specification 50 -2. Follow the manufacturer’s recommendations in the selection of the wire insulation cable color inside the cabinet.
(d)Circuit breakers and panels. Conform to UL 489, Molded- Case Circuit Breakers, Molded -Case Switches and Circuit -Breaker Enclosures and UL 67, Panelboards . Provide molded case thermal magnetic trip type breakers. Provide panel encl osures conforming to NEMA 250, Enclosures for Electrical Equipment (1,000 V Maximum) , Type 3R and lockable with padlocks.
(e)Safety disconnect switches. Provide heavy- duty safety disconnect switches conforming to NEMA 250, Enclosures for Electrical Equipment (1,000 V Maximum) , Type 3R and UL 98 Enclosed and Dead -Front Switches .
(f)Grounding and bonding equipment. Provide ⅝- inch diameter, 8 -foot long, copper -clad steel ground rods, ground clamps, grounding and bonding bushings, and lock nuts conforming to UL 467, Grounding and Bonding Equipment .
(g)Contactors and control transformers. Provide a magnetic 60 -ampere, two- pole contactor with a 120-volt coil, equipped with control switches for automatic actuation conforming to UL 508, Industrial Control Equipment . Provide cadmium -sulfide type photocell controls for 120 or 240-volt operation as applicable rated at 1000 watts resistive load or 1800 volt- amperes inductive load; adaptable for pole -top mounting in a plug- in, locking- type receptacle conforming to UL 773, Plug -In Locking Type Photocontrols for Use with Area Lighting; and with a built -in surge protective device for protection from induced high -voltage and follow -through currents. Provide single -phase, 240/480- volt primary, 120/240- volt seco ndary, dry type, 60 hertz, 1 KVA transformers for indoor or outdoor use, conforming to UL 506, Specialty Transformers.
(h)Secondary lightning arrester. Provide a secondary lightning arrester rated for a maximum operating voltage of 650 volts RMS with a bracke t for mounting on the control cabinet backboard.
(i)Service poles. Provide treated southern yellow pine, treated Douglas fir, butt -treated western red cedar, or butt -treated northern white cedar service poles that are at least 30 feet long. Treat the poles according to Subsection 716.02.
(j)Meter cabinet. Conform to local power company requirements.
(k)Control enclosure. Provide a watertight outdoor cabinet conforming to NEMA 250, Enclosures for Electrical Equipment (1,000 V Maximum) , Type 3R, fabricated from 0.125- inch-thick ASTM B209 aluminum alloy 5052-H- 32, with continuous welded seams, rounded corners, hinge with stainless steel pin, stainless steel external hardware, and backboard for mounting apparatus. 859 Provide loop surge protection devices conforming to Table 721 -1 at the terminal block on all lead -ins. Table 721-1 Surge Protection Device Minimum Requirements
Property Rating
Operating voltage 75 voltage direct current (VDC) Clamping voltage 130 VDC Peak surge current 250 Ampere
Technology Silicon breakover device
Operating temperature -40 °F to 185 °F Weight 3 oz Dimensions 1.2 in cube Provide a surge protection power strip, 120- volt with RJ -11 or RJ -45 surge protection. Connect incoming phone line and modem phone line to power bar RJ-11 or RJ -45 ports. Provide a tube axial compact type, 120- volt, corrosion resistant cabinet fan with a minimum 100 cubic foot per minute capacity, minimum 100,000 hour design life, maximum 40 decibel operating noise, and a five -year duty cycle. Fuse the fan at 125 percent of the motor’s ampere capacity. Ensure the fan’s magnetic field does not affect the performance of the surrounding traffic counting equipment. Provide an inline type, single pole, 120- volt, 10 -ampere cabinet fan thermostat that is adjustable in 10-degree increments from 70 °F to 200 °F, and with a turn- on setting that is adjustable from 90 °F to 120 °F.
(l)Splices and crimps. Use UL listed splices and crimp type connectors and terminals. Use waterproof connections in damp or wet locations.
721.02Lighting Material. Conform to the following:
(a)Poles. Provide 11 gauge round steel conforming to ASTM A595 or aluminum shafts conforming to ASTM B429, alloy 6063- T6, tapered uniformly at 0.14 inch per foot. Provide hand holes with no rough edges and a reinforcing frame and cover designed to maintain the required pole strength. Weld a 2⅜- to 3.0 -inch outside diameter vertical tenon, fabricated from the same material as the pole, and welded at the top and on the same axis as the pole. Provide pole sections in minimum 15- foot lengths. Provide pole sections less than 70 feet in height in two sections or less, between 70 and 100 feet in three sections or less, and over 100 feet in four sections or less. Provide poles that can sustain the following loadings:
(1)A horizontal load of 500 pounds applied 18 inches from the shaft top, in any direction, without failure of any component part, and a maximum allowable vertical deflection of 7.5 percent of the shaft length.
(2)A horizontal load of 50 pounds applied at the luminaire attachment point and normal to the pole bracket member plane, with a vertical load of 30 pounds on the luminaire supporting ar m, and a maximum allowable horizontal deflection of 10 percent of the luminaire supporting arm’s horizontal length.
(3)A vertical load of 100 pounds applied at the luminaire attachment point, and a maximum allowable vertical deflection of 5.5 percent of the pole arm’s horizontal length.
(4)A vertical load of 250 pounds applied at the luminaire attachment point, and no collapse or rupture of any portion of the structure.
(5)The pole arm and luminaire mass with a maximum allowable deflection from vertical at the top of the pole of 1 percent of the total shaft length. Prime the poles inside and out according to the fabricator’s recommendation. Use epoxy modified enamel for the finish coat.
(b)Pole arms.
(1)Material. Provide steel or aluminum. Use the same material as the pole.
(2)Type. Provide bracket type, truss or single member arms. Provide single member arms with a minimum diameter of 2 inches and the same taper as the pole.
(3)Connection. Provide a weather resistant connection to the pole and a smooth raceway for wiring. Provide fittings for connection to the pole.
(c)Anchor bases. Provide a one -piece base dimensioned for adequate pole mounting and structural support with holes for anchor bolts and tapped holes for anchor bolt covers. Fabricate anchor bases from material similar to the pole material and conform to the following:
(1)Steel cas ings AASHTO M 103, Grade 65-35
(2)Steel plate ASTM A36
(3)Aluminum castings ASTM B26
(d)Bolts, nuts, and washers.
(1)Steel anchor bolts. Conform to ASTM F1554, Grade 55 or Grade 105.
(2)Hex head bolts. Conform to the following:
(a)120 ksi yield anchor bolts ASTM F3125
(b)105 ksi yield anchor bolts ASTM A354, Grade BC
(3)Nuts. Conform to ASTM A563. Provide nuts appropriate for the strength of the anchor bolt.
(4)Washers. Provide flat, circular washers conforming to ASTM F436. Galvanize the top 12 inches of anchor bolts and associated hardware according to AASHTO M 232. (e) Anchor bolt covers. Provide a bolt cover for each anchor bolt and ¼- inch stainless steel, phillips -head or hex-head screws to attach the cover to the base or pol e. 861 (f) Luminaires. Provide luminaires that operate on a 240- volt series circuit. Provide the following types of luminaires:
(1)Conventional highway luminaires. Provide material for a complete installation including:
(a)Aluminum housings with refractor holder and slipfitter;
(b)Thermal shock -resistant glass prismatic refractors with gaskets and clips;
(c)Aluminum detachable reflectors with ethylene propylene terpolymer gas kets; and
(d)Internal regulator or auto regulator type ballast, with a power factor greater than 90 percent that will start lamps at a minimum ambient temperature of - 20 °F or equivalent Light -Emitting Diode (LED) . Comply with ANSI specifications.
(2)Sign lighting luminaires. Provide material for a complete installation including:
(a)Die-cast aluminum housings with mounting bracket and door assembly;
(b)Thermal, shock- resistant, borosilicate glass refractors with gaskets;
(c)Aluminum reflectors; and
(d)120/240- volt, 60 hertz constant -wattage ballasts with a power factor greater than 90 percent that will start lamps at a minimum ambient temperature of -20 °F or equivalent LED.