For conventional light poles, a 1/2 in. by 13 UNC threaded grounding nut or other approved method shall be provided near th e bottom of and shall be accessible through the handhole for attaching the ground wire. The ground wire shall be No. 6 AWG soft- 50 drawn, solid copper in accordance with ASTM B3. Mast arms less than 8 ft in length shall either be single member or truss type, except that mast arms for poles on bridge deck shall be truss type. Single member arms shall be a tapered tube, oval shaped, at the pole end with the long dimension in the vertical plane, welded to a pole plate an d bolted, or clamped, to the shaft with a minimum of four 1/2 in. bolts. Mast arms 8 ft and over in length shall be truss type. The upper member shall be a tapered tube, oval shaped, at the pole with the long dimension in the horizontal plane. The lower member may be standard pipe. Both members shall be welded to a pole plat e and bolted or clamped to the pole. 60
A minimum of four 1/2 in. bolts at the upper member and a minimum of two 3/8 in. bolts at the lower member shall be used if a pole plate configuration is used to attach the mast arm to the pole. Mast arms that are clamped to the pole shall have a minimum of four 1/2 in. bolts per clamp. Mast arms shall provide an enclosed raceway for the wiring and shall be free of burrs and rough edges. Each arm shall be furnished with a 2 in. nominal pipe size slipfitter. The maximum rise of the truss style arm shall be as set out in the table and shall be measured vertically from the centerline of the free end of the truss to a plane through th e centerline of the upper arm bracket after loading. 70
Mast Arm Length, ft Maximum Rise, ft 9 or less 4 10 to 14 5 15 to 19 5.5 20 to 25 6 26 to 30 8
Light poles shall be constructed to provide a nominal luminaire mounting height above the roadway pavement as shown on the drawings. The elevations of foundations above or below the edge of the pavement shall be controlled by existing roadside conditions. The effective mounting height shall be determined by field measurement prior to placing an order for the poles. A variation in the nominal mounting height of ±1 ft is allowed so that the “Effective Mounting Height”, foundation to luminaire, of the light standards may be 80 supplied for 40 ft nominal mounting height. 920.01 1148 Elevation of Foundation Top with Respect to the Near Road Edge, ft Effective Mounting Height, Foundation to Luminaire, ft +7.00 to +5.01 34 +5.00 to +3.01 36 +3.00 to +1.01 38 +1.00 to -1.00 40 -1.01 to -3.0 42 -3.01 to -5.00 44 -5.01 to -7.00 46
The effective mounting heights for other nominal mounting heights deviate from the table by the difference in nominal height and 40 ft.
and of sufficient diameter and wall thickness to withstand the design loads. The pole shall be tapered full length or tapered in the middle with the top or bottom approximately 1/3 of the pole of constant cross-section. The minimum wall thickness for poles on breakaway couplings and steel slip bases shall be 0.219 in. Poles on transformer bases or shoe anchor bases installed without breakaway devices are exempted from this minimum wall thickness requirement. An inner tube extension, or sleeve, fitted inside the main tube shaft, is permissible to increase the wall thickness of the shaft starting at the bottom of the shoe base and extending upward towards the top of the pole. The sleeve or tube extension shall be no less than 3 ft in length, fabricated from aluminum alloy 6063-T4 and heat treated to produce a T6 temper after 100 placing in the shaft. The minimum wall thickness of the combination of shaft and sleeve shall be 0.219 in. Attaching plates or clamps for aluminum mast arms shall be in accordance with ASTM B241, alloys 6061-T6, 6063-T6, 356.0-T6, or 5052-H32. The bottom end of the shaft shall be welded to a one-piece cast aluminum shoe anchor base of 356.0-T6 aluminum alloy in accordance with ASTM B26 for sand castings or ASTM B108 for permanent mold castings or equal and provided with four slotted holes for anchor bolts and the shaft’s full length shall be heat treated to produce a T6 temper. The top of the shaft shall be provided with a removable aluminum pole cap. The shaft shall have no longitudinal welds. After fabrication, the shaft shall be cleaned to a satin finish and wrapped for protection during shipping and handling. 110
diameter and wall thickness to withst and the design loads. The minimum wall thickness for poles on breakaway couplings and steel slip bases shall be 0.219 in. Poles on transformer bases or shoe anchor bases installed with no breakaway devices are exempted from the minimum wall thickness requirement. The anchor base shall be 920.01 1149 one-piece cast aluminum in a ccordance with ASTM B26, alloy 356.0-T6. The base casting for the formed and welded shaft shall be designed to be inserted a minimum of 120 12 in. into the shaft and bonded to the shaft with a weatherproof structural epoxy adhesive that fully develops the required strength as specified by the design criteria. After fabrication, the shaft shall be cleaned to a satin finish and wrapped for protection during shipping and handling. 3. Galvanized Steel Light Poles The pole and base plate shall be fabr icated from steel in accordance with ASTM A572, A595, or A1011 with a minimum yield strength of 50,000 psi. Single member mast arms and the upper members of truss type mast arms shall be fabricated from steel in accordance with ASTM A572 or A595 with a minimum yield strength of 130 50,000 psi. The lower member of truss type arms may be fabricated from standard steel pipe in accordance with ASTM A53 w ith a minimum yield strength of 36,000 psi. After fabrication, the pole and mast arm shall be thoroughly cleaned and galvanized in accordance with ASTM A123. Steel poles shall be tapered 0.14 in./ft and shall be round, octagonal, or dodecagonal. The design load shall be used to determine the pole diameter and wall thickness. Design calculations stamped by an Indiana registered professional engineer shall be submitted with the working drawings. The pole shall have one longitudinal electrically welded join t. A steel base plate shall be welded to each pole and provided 140 with four slotted holes for the anchor bolts. All welds on steel poles shall be performed at the factory. Base plate welds shall be 100% penetration. Circumferential welds shall be backed-up welds with 100% penetration. Longitudinal welds shall be a minimum of 60% penetration. The 100% penetration welds shall be ultrasonically inspected and all other welds shall be inspected by magnetic particle. Welding sh all be performed in accordance with
711.32
Timber poles for highway light pole shall be in accordance with 922.10(b). 5. Frangible Breakaway Bases All light poles, except high mast towers, those protected by bridge end bents or retaining walls, and those placed along sidewalks, pedestrian pathways, and bicycle pathways shall be installed on breakaway de vices. All breakaway devices on a contract shall be of the same type and manufacturer. Breakaway devices shall be in accordance with AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals as 160 modified in 920.01(a)1. A certification from the manufacturer shall be furnished with the shop drawings stating the breakaway devices conform to the breakaway criteria of the AASHTO 920.01 1150 LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic Signals.
transformer base may be slotted. The pole shall be bolted to the transformer base with four 1 in. diameter galvanized steel bolts.
An approved handhole in the transformer base may be substituted for the 4 in. by 8 in. handhole specified in 920.01(a)1. b. Breakaway Coupling Breakaway couplings may be used with aluminum poles with mounting heights up to 50 ft and with steel poles that weigh 600 lb or less. The couplings shall be furnished with necessary hardware includi ng a two-piece cover. Couplings shall be 180 installed in accordance with the manufacturer’s instructions and recommended clearance between the top of the foundation and the bottom of the breakaway coupling.
Anchor bolts shall be 1 in. with 8NC rolled threads in accordance with ASTM A307. The minimum length of threads shall be 6 in. Mean diameter of rod stock shall be 0.918 in. ±0.011 in. and out-of-round tolerance shall be ±0.012 in. The top 10 in. of the bolt shall be galvanized in accordance with ASTM F2329 or mechanically galvani zed in accordance with ASTM B695, Class 55. Anchor bolts shall be in accordance with 910.19(b). The bo lts shall be a minimum of 36 in. in length 190 for poles 8 in. outside diameter or less and 48 in. in length for poles 9 in. or 10 in. outside diameter. In addition to the minimum length, the bolt shall have a 4 in. right angle bend at the unthreaded end. The anchor bolts in bridge structures shall be as shown on the plans.
The high mast pole, base, anchor bolts, lowering device, installed fixtures, and associated appurtenances shall be designed to withstand a minimum wind speed of 120 mph using applicable design criteria in accordance with AASHTO LRFD Specifications for Structural Supports for Highway Signs, Luminaires, and Traffic 200 Signals. Minimum design criteria for high mast tower heights from 60 ft to 120 ft shall be an effective projected area of 14.70 sq ft and a weight of 740 lb to account for 6 luminaires and a 6 place lowering ring. Criteria for high mast tower height from 125 ft to 200 ft shall be an effective projected area of 26.70 sq ft and a weight of 1,065 lb to account for 12 luminaires and a 12 place lowering ring. If larger fixtures are used, the actual size and weight shall be used in the design of the pole.
The Contractor shall be responsible for the accuracy of the dimensions and the proper fit of all material and equipment furnished with the pole. The Contractor shall provide all applicable manufacturers’ warranties for material and workmanship. 210 920.01 1151 External lowering devices shall be designed to attach to the pole as shown on the plans. The pole shall include the mounting accommodations as shown on the plans.
The poles shall be tapered shafts having poly-sided or circular cross-sections. The pole shaft sections shall be slip fitted and shall provide at least 1 in. radial clearance from all interior devices. All tower shaft components shall be fabricated from high strength, low alloy, steel in accordance with AASHTO M 270; ASTM A5 95, grade A or B; ASTM A572, grade 220 55; ASTM A1011; ASTM A606, or ASTM A656, with a minimum yield strength of 50,000 psi. Sections which are slip fitted shall have slip joints with a minimum overlap of 1.5 times the diameter of the bottom of the upper section at the slip joint. Towers having slip joint construction shall be match marked at the factory and shall be shipped disassembled for assembly at the work site. Slip joints shall be marked to ensure that the 1.5 times diameter insertion is provided. All steel used in the base plate and shaft shall meet an impact property of 15 ft·lb 230 at 40°F in the longitudinal direction using the Charpy V-Notch test. This shall be an average of three tests per mill heat with no test below 10 ft·lb. A copy of the certified mill test reports for this steel and the Char py V-Notch test results shall be submitted. Sufficient information shall be furnished to demonstrate that this material is traceable to the mill heat number shown on the test report.
All tower shaft hardware including hardware for the handhole door, and the latch mechanism shall be stainless steel in accordance with ASTM A276, type 304 or 305, except where otherwise specified. 240 After fabrication, the pole shall be cleaned and galvanized . Galvanized steel towers, including the handhole, handhole door, base plate, mounting plate, and all other elements welded to th e shaft shall be hot-dip galv anized in accordance with AASHTO M 111 or ASTM A123. 2 . W e l d i n g The welding symbols and all information regarding location, type, size, welding sequence, and welding procedure specifications shall be shown on the working drawings. 250 Welds shall be smooth and cleaned of flux and spatter in accordance with AWS procedure. Minimum preheats for welds shall be 100°F for seams, and 225°F for circumferential welds. All welds shall be performed at the factory. Circumferential welds shall be backed-up welds with 100% penetration. Longitudinal welds shall have a minimum of 920.01 1152 60% penetration except within 2 ft of either side of the circumferential joint, the welds shall be backed-up and of 100% penetration. Base plate welds shall be 100% penetration. Circumferential welds and 100% penetration longitudinal welds shall be 100% ultrasonically inspected. The 60% penetration longitudinal welds shall be 100% 260 ultrasonically or radiographically inspected for soundness. Welding shall be performed in accordance with 711.32. Weld filler shall provide Charpy V Notch equal to or greater than 20 ft·lb at 0°F.
The manufacturer shall provide quality control, QC, inspection. The inspector shall be an AWS CWI, in accordance with AWS D1 .1. The NDT inspector shall be an independent non-destructive-testing inspector, certified as level II in RT, UT, or MT, or all as applicable. Copies of the inspection reports and NDT reports shall be provided to the Engineer. 270
The method for testing full penetration and partial penetration welds by the independent welding inspector shall be the same as specified above. b . B l a n k
Openings for handholes shall be reinforced to maintain the design strength of the pole. The handhole shall have a weatherproof gasket made of neoprene or silicone rubber. The gasket shall be formed for a forced fit around the handhole or be attached 280 by mechanical means. The door and hinges shall be the same type steel as the poles. The hinge pins and other securing hardware shall be stainless steel and tamperproof. The door shall be fabricated to allow for a padlock, which is not included in the hardware. The hasp used for padlocking shall be fabricated from stainless steel. Provisions shall be made to bolt the door securely shut. The door shall include a bugproof and weatherproof aperture with a minimum opening of 4 sq in. Nylon or non-corrosive screens, or other approved methods of bug proofing shall be furnished. Two bonding plates shall be furnished whic h are accessible through the pole handhole for connecting the ground wires. A connecti on shall be furnished for an additional ground wire on the outside of the pole near the base plate. 290
The ring shall be fabricated from ASTM A666, Type 304 stainless steel and shall have a removable raceway cover. The ring sh all be fabricated as an enclosed wire raceway to provide for the symmetrical mo unting of the luminaires. All structural connections shall be made with bolts and nuts. The luminaire ring shall be supported by means of stainless steel aircraft cables of seven strands with 19 wires per stra nd with a minimum breaking strength of 3,700 lb. 300
Luminaire rings shall be provided with either 6 or 12 - 2 in. diameter pipe fittings for luminaire attachment. The number of luminaires and their positions on the ring will 920.01 1153 be shown on the plans. Counterweights that provide an even weight distribution shall be installed on pipe fittings where luminaires are not shown.
required pulleys, rollers, or sheaves and shaf ts shall be constructed from non-corrosive metallic materials. No component shall be used in the lowering device in excess of its 310 rating or in violation of the component manufacturer’s recommendation. This requirement shall be applicable, but not limited to, the compatibility of the cables and sheaves. There shall be three supports for the suspension cables. A roller system or one compatible sheave for the power cable sh all be located mid-point between two of the suspension supports. To prevent the cables from riding out of the grooves, cable guides shall be provided. The suspension cable sheaves shall have a minimum pitch diameter of 3 1/2 in. and the power cable sheave or individual rollers in a roller assembly shall have a minimum pitch diameter of 18 1/2 in. and shall be grooved to fit the power cable. 320 All components at the top of the pole shall be protected from the weather by a dome fabricated from steel in accordance with 920.01(b)1, fiberglass, or spun aluminum.
The dome shall be secured to the head frame assembly w ith at least eight fasteners around the perimeter of the dome. The dome shall be reinforced at the points of attachment and it shall be fitted to the head frame assembly so that no visible distortion occurs to the dome when it is properly in stalled. The dome attachment shall be designed to withstand pole vibration, ot her pole movement, and the design windload. The fiberglass dome shall be made of material that is not subject to cracking or other 330 deterioration because of aging.
strands with 19 wires each strand with a minimum breaking strength of 9,800 lb. The winch shall have a drum with a minimum diameter of 4 in. and drum flanges with a minimum diameter of 8 in. The drum shall be supported at each end by a rigidly mounted, permanently lubricated, bearing capable of carrying the design load. The winch drum shall be designed to allow the cable to lay in even consecutive layers. 340
The winch shall be driven by a self-locking, worm gear reducer. The gear reducer shall be permanently lubricated and totally enclosed in a cast aluminum or cast iron housing. The winch assembly shall be powered by an external drive system.
The external drive system shall be powered by a heavy duty reversing NEMA frame motor with an electromagnetic friction breaking mechanism rated at a minimum of 6 ft·lb of torque per motor horsepower (746 W). The brake shall be actuated each 920.01 1154 time the power to the motor is interrupted. The breaking mechanism shall be an 350 integral part of the motor housing. The motor operated drive shall have a factory set torque limiter or clutch. This clutch assembly shall be calibrated to position the ring at the top of the pole and not exceed 80% of yield strength of the cable. The external drive system shall operate with the 240/480 AC volt power available at the pole or incorporate a tr ansformer into the system. Th e external drive system may use either the luminaire power plug or a separate outlet with a 600 volt, 30 ampere rating. The external drive system shall be operated from a minimum distance of 25 ft from the pole. The control voltage for any handheld control equipment shall not exceed 120 volts. The handheld control equipment shall be shock proof. 360 The external drive system shall be cap able of operating all high mast pole installations. Working drawings shall be furnished in accordance with 105.02 and shall include the dimensions and the wiring diagram of the standard connections of the external drive system. The ex ternal drive system shall be mounted on a two-wheel cart with wheels at least 12 in. in diameter and the weight shal l be distributed so that it presents a balance load. 8. Cable Terminator The three luminaire ring support cables shall be attached to three stainless steel 370 helical compression springs incorporated into the cable terminating device. These springs shall be designed to compensate for inequalities in the cable lengths and to maintain adequate tension on the support cables through pole and cable thermal expansion and contraction.
The cable terminator shall incorporate a separate eye bolt on the bottom of the device for the attachment of a cable or ch ain to hold the luminaire ring in a raised position while the winch cable or winch assembly is being inspected or repaired. The cable terminating device shall be designed to prevent the device from catching on the slip joint of the structure. 380
The lightning rod, air terminal, shall shield the head frame assembly cover and the outer edge of the luminaires within a 45° electrostatic shielded cone. The grounding system shall include bonding plates, grounding clamps, four copper weld grounding rods, a grounding conductor, air terminal, lightening rod, and other incidental connectors. All hardware shall be stainless steel, brass, copper, copper alloy, or equally corrosion-resistant metal. Bonding plates, with a minimum contact surface area of 8 sq in., shall be installed 390 at locations shown on the plans. The bonding plates shall be welded to the tower shaft during the time of manufacturing. The grounding conductor shall be secured to the bonding plates by a two-bolt pressure plate clamp connector having a minimum of 4 in. of contact with the copper. At the point of termination, the grounding conductor shall extend beyond the bonding plate a minimum of 3 in. 920.01 1155 Each ground rod clamp shall have a minimum of 1 1/2 in. of contact between the grounding conductor and the ground rod. The grounding conductor shall be continuous between the bonding plates inside the tower shaft handhole and the grounding rod termination point. 400 Bends of conductors shall form an angle of 90° or more. Unsupported conductors shall have a radius of bend 8 in. or greater.
shall be a hooked deformed reinforcing bar or a hooked smooth bar. The bolts shall be in accordance with ASTM A615 modified to a minimum yield stre ngth of 75,000 psi. The top 12 in. of each anchor bolt, nut, and washer shall be hot-dip galvanized in accordance with ASTM A153 or be mechani cally galvanized and in accordance with 410 the coating thickness, adherence, and quality requirements of ASTM B695, class 55. (c) Wire and Cable Lighting circuit cables for direct burial shall be enclosed in polyethylene conduit.
This conduit shall be in accordance with ASTM D3485 either medium density Type II, class C or high density Type III, class C smooth wall, coilable polyethylene conduit for preassembled wire and cable. The diameter of the conduit shall be 1 1/4 in for the standard 4-No. 4 conductor cable. 420
The cable shall consist of four separate electrically insulated conductors installed in the duct so any one conductor may be ea sily removed without damage to the other two. The conductors shall not be cabled or twisted together. The conductors shall be stranded copper of the No. 4 AWG size. Conductors shall be stranded in accordance with ASTM B8, class B. Each conductor shall be insulated with crosslinked polyethylene manufactured in accordance with Insulated Power Cable Engi neer Association standard WC 70/ICEA 430 S-95-658-1999, Nonshielded 0-2kV Cables . Each conductor shall have a 600-volt rating, be UL listed, and have an XHHW conductor temperature rating not to exceed either 90°C in dry conditions and 75°C in wet conditions. Each of the four conductors shall be imprinted at regular intervals with the following description: Type XHHW; 600 volt; UL; the conductor’s AWG size and metal or alloy; the manufacturer’s name, trademark, or other distinctive marking by which the product can be readily identified. Identification coding of the conductors shall be accomplished by complete color 440 coding. Color coding of the insulation shall be homogeneous throughout the entire 920.01 1156 depth and length of the jacket. The colors shall include one black, one white, one red, and one green.
This wiring shall consist of two 1/C No. 10 AWG, 600 volt, THWN or MTW insulation, stranded copper wire. 4. Sign and Underpass Wiring The wiring from the switch box to the last luminaire shall be 3/C copper stranded 450 No. 10 AWG conductors and shall have imprinted at regular intervals along the length of the insulation jacket the following designation: No. 10 AWG, type MTW or THWN, or Gasoline and Oil Resistant II or AWM, 600 volt, UL. The conductor classifications shall be UL listed and have the following minimum temperature ratings: MTW 90°C, THWN 75°C, and AWM 105°C. It shall be installed in 3/4 in. conduit between the breaker box and luminaires.
conductor shall be No. 6 AWG stranded copper with 600 volt, XHHW-XLP type insulation.
The power cable shall be a 4/C No. 10 AWG copper insulated electrical cable Type “SO” modified for a repetitive reeling operation. It shall be in accordance with 470 ASTM B3, ASTM B173, and IPCEAS-19-83. Conductor insulation shall be in accordance with ASTM D1693 and IPCEAS- 19-81, Paragraph 3.12. The sheath or jacket shall meet or exceed IPCEAS-19-81, Paragraph 7.6.20.1.1. Conductors shall be color coded. The power cable shall have a heavy-duty 600 volt, AC 30 amp rated electrical plug capable of disconne ction in a safe manner under load conditions. The electrical plug shall be moisture resistant and waterproof at both transition points.
Connectors shall be a compression type of the proper size with only one conductor per groove in the fitting. They shall be designed specifically for use on aluminum and copper conductors, prefilled with an oxide inhi bitor, and installed with a hydraulic tool according to the manufacturer’s specifications . After installation, the connectors shall be fully insulated and weatherproofed. The connectors installed in underground handhole shall be taped and then waterproofed as shown on the plans. 920.01 1157 (d) Luminaires Underpass, Roadway, and High Mast models shall be selected from the QPL of Luminaires. 490
the plans. Luminaires, including primary fuse protection, surge protection devices, power drivers, and other major components, shall be rated for a minimum operational life of 50,000 hours at 77°F. Luminaires shall be a single, self-contained device, not requiring on-site assembly for installation. Connectors shall be crimp or cage-clamp type. 500 All internal components shall be adequately supported to withstand mechanical shock and vibration. Luminaires shall be tested in accordance with ANSI C136.31, 2G loading or ANSI C136.31, 3G loading for luminaires on bridges. Testing about all axes shall be accomplished with a single luminaire. Luminaires shall include gasketing that will completely seal out dust, moisture, and insects from the interior of the optical assembly and retard the formation of an undesirable film from gaseous vapors on the interior of the optical assembly. The optical assembly shall be rated at IP 66 or better in accordance with ANSI/IEC 60529. Power drivers, and surge protection devices shall be rated at IP 65 or better. 510 Light sources supplied for luminaires shall be electrically compatible with the luminaires. Luminaires shall include an integrally built-in power driver. The luminaire shall operate satisfactorily in temperatures from -40°F to 122°F with an input voltage variation of ±10% of the rated operating voltage specified. Power consumption, wattage, shall not exceed that which is show n on the plans. The lu minaire power factor shall be 0.9 or greater. The power driver, or combination of power drivers if more than one is used in the luminaire, shall have a Mean Time To Failure, MTTF, of 1,000,000 hrs as determined 520 by Telcordia SR 332, Issue 3 or MIL-HDBK-217F methodology. The MTTF estimate shall be for the driver as a complete and functioning unit. Total Harmonic Distortion, THD, of the power driver shall not exceed 20% as verified by ANSI C82.77. Roadway lighting luminaires shall have a precision-cast aluminum housing with weatherproof finish. Refractors or lenses shall be scratch resistant and made from high impact, heat-resistant glass, or UV inhibited, high impact polycarbonate plastic. If utilized, reflectors shall be detachable and made of highly specular aluminum. 530 Luminaires shall have seven wire photocontrol receptacle in accordance with ANSI C136.41 with shorting cap for adaptive lighting control. 920.01 1158 Luminaires shall exhibit a color temperature in the range of 3500K to 4500K per ANSI C78.377 and a minimum Color Rendering Index of 70 as verified by the IESNA LM-79 test. A Surge Protection Device, SPD, shall be included to protect the luminaire from damage and failure from transient voltage and currents. The SPD shall conform to UL 540 1449 and shall be tested in accordance with, and survive, the procedure in ANSI/IEEE C62.41.2 definitions for standard and op tional waveform for location category C- High. Once the surge current has subsided, the SPD shall automatically restore normal operation and reset to a state ready to receive the next surge. Luminaires shall comply with Title 47 CFR Part 15, Class A on unlicensed transmissions in a business, commercial, or industrial environment.
Underpass and post top mounted luminaires shall be protected against salt spray and conform to ASTM B117, 2,000 hrs time horizon. 550 Luminaires shall include vandal shields when installed on an underpass or signs on bridge brackets and when otherwise specified. The vandal shield shall be made of a tough durable plastic, such as Lexan, mounted in a rugged galvanized steel or aluminum frame, and shall withstand severe impact without being damaged or allowing the refractor to be damaged. It shall be fastened securely to the luminaire so it cannot be removed from the outside and shall not interfere with the light distribution pattern. It shall protect the face of the refractor and if ventilation is necessary, the ventilating apertures shall be arranged so that they do not admit a probe of a diameter greater than 1/4 in. 560 Luminaire shall be aimable toward the required direction.
LEDs shall be connected so that the loss of one LED will not result in the loss of the entire luminaire. LED circuitry shall prevent flickering to the unaided eye at the voltage specified on the plans and the range indicated herein. LEDs shall deliver a minimum of 85% of the initial rated lumens after 50,000 hours of operation at 130°F ambient temperature as indicated by LM-80 lumen 570 maintenance test of the light source as calculated by IESNA TM-21, L85 > 50,000 hrs. A passive thermal management system to dissipate the heat generated by operation shall be provided. Fans or other mechanical cooling systems shall not be used.
The thermal management system shall maintain temperatures during the operation of the luminaire to be within the limits established by the Power Driver Lifetime and LM-80 testing. 580 920.01 1159 b. Light Emitting Plasma Luminaires Plasma emitters shall deliver a minimum of 70% of the initial lumens after 50,000 hrs of operation.
against vibration. 590
bolt slipfitter capable of adapting to a 2 in. mounting bracket that is adjustable ±5° for leveling. Luminaires shall be adjustable in the horizontal and vertical directions to meet the specified IESNA light distribution pattern. Luminaire weight shall not exceed 53 lb and its projected area shall not exceed 2.4 sq ft. 600
Sign and underpass luminaires shall be LED and operate on no more than 150W of power. Sign luminaires shall have a shield that blocks the view of the refractor from an approaching motorist. This shall be accomplished by the design of the housing or by a shield fabricated from sheet aluminum, approximately 0.05 in. thick, and of sufficient size to be fastened onto the horizontal edge of the refractor holder with self tapping screws and placed between the refractor and approaching traffic. Aluminum and steel structural members for luminaire supports shall include 610 aluminum conduit, conduit clamps, fittings, and stainless steel screws.
All circuit breaker enclosures shall be NEMA 4/5. 1. Circuit Breakers for Type II Service Point The cabinet and hardware shall be weatherproof and rain tight. The enclosure shall have provisions for padlocking. The fastener and mounting hardware shall be plated brass, stainless steel, or aluminum. The enclosure shall be made of 14 gauge aluminum, or 14 or 16 gauge stainless steel. The circuit breaker operating handles for 620 manual tripping shall be concealed inside the enclosure. Computation of branch circuits shall be based on the National Electrical Code Standard Limitation of loading breakers to 80% of their rated current. Additional details shall be as shown on the plans. 920.01 1160 2. Circuit Breakers fo r Sign and Underpass Circuits Sign and underpass circuit protection shall be provided by two single pole, 240 volt AC, 120 volt for 120/240 volt service, circuit breakers with ampere rating of 200% of the normal load. The circuit breakers shall have provisions for padlocking 630 externally. The circuit breaker operating handles for manual tripping shall be concealed inside the enclosure. The enclosur e shall be made of aluminum or stainless steel. Additional details shall be as shown on the plans.
The enclosure shall be furnished with two single pole, 30 ampere, 480 volt AC circuit breakers with a minimum symmetrical RMS interrupting capacity of 14,000 amperes. The breakers shall be accessible through the pole handhole. The circuit breaker operating handles for manual tripping shall be external to the enclosure. The enclosure shall be made of aluminum or stainless steel. Additional details shall be as 640 shown on the plans.
These breakers shall have the following features:
temperature changes over their operating environment of -40°F to 185°F,
the ON position.
Multiple relay switches with photocell receptacles shall have a two-pole relay for 660 connection to a 120/240 or 240/480 volt, three-wire, single phase, 60 Hz power supply. The relay switch components shall match the service voltage being supplied. The unit shall contain two single pole circuit breakers with a minimum rated capacity to withstand 100% of the rated ampere load. The circuit breakers shall trip at not less than 125% of the rated load capacity. Control circuit arresters for lighting protection and a manual control selector switch shall be included within the unit. The enclosure shall be a cast aluminum weatherproof case, with a hinged cover, having provisions for padlocking and a hanger for pole or wall mounting.
A Type C certification in accordance with 916 shall be provided for the materials in this section unless otherwise specified. 920.01 1161
The junction box shall be polymer concrete , of concrete-gray color, with a cover rating of 20,000 lb. (i) Handholes Handholes shall be in accordance with 922. 17 except the cover shall be with the logo imprint of “LIGHTING”. 680