889.01 General.
sides of the marker shall be smooth and free from mold marks, pits, indentations, air bubbles, or other objectionable marks or discolorations. The base of the marker shall be flat (deviation fro m a flat surface shall not exceed 0.05 inch {1.27 mm}) rough textures (comparable to at least that of a fine grade sand paper) and free from gloss or substances which may reduce the markers bond to the adhesive.
b.Materials . Ceramic - Heat fired, vitreou s, ceramic base and a heat fired, opaque, glazed top surface. The bottom surface shall be unglazed, suitable for cementing to the road surface. The marker may be produced from any suitable combination of intimately mixed clays, shales, talcs, or other inor ganic material. The marker shall be thoroughly and evenly matured and free from defects which will affect the appearance and serviceability.
c.Tests .
1.Color. White - Brightness relative to Magnesium Oxide - 80% Minimum. Yellow - Brightness relative to Magnesium Oxide - 40% Minimum and match the standard shade within the red and green balances when compared with Color Chip 33538 of Federal Standard No. 595.
2.Water absorption - 2% Max. (ASTM C 373)
3.Hardness - Moh Hardness - 6 Min.
4.Autoclave Test - shall not craze, spall, or peel when subjected to one cycle at 250 psi {1724 kPa} - ASTM C 424.
5.Glaze Thickness – 0.005 inch {0.13 mm} Min.
6.Strength - Markers shall be capable of supporting a load of 1500 pounds {680 kg} applied as follows: A marker shall be centered over the open end of a vertically positioned hollow metal cylinder. The cylinder shall be at least 1 inch {25 mm} high, with an internal diameter of approximately 3 inches {75 mm}, and with a minimum thickness of 1/4 inch {6 mm}. Loading shall be slowly applied to the top of the marker through a 1 inch {25 mm} diameter by 1 inch {25 mm} high metal plug centered on the top of the marker. An average compressive strength of three markers shall be obtained; however, any individual marker whic h fails under a compressive load of less than 1200 pounds {500 kg} shall be cause for rejection of the marker lot being tested.
7.Adhesive Bond Strength - The adhesive tensile bond strength to the bottom of the marker accepted for use on the project and the epoxy adhesive accepted for use on the project shall be not less than 1500 psi {10 MPa}.
882.04 Adhesives For Pavement Markers.
Bituminous adhesive used to affix permanent pavement markers to the pavement shall be one of those listed in List V -2 of the Department's manual "Materials, Sources, and Devices with Special Acceptance Requirements." The adhesive used to affix the temporary markers to the pavement shall be any suitable type of adhesive for the intended purpose, except that in those lo cations where the markers will be required to be removed, the adhesive shall be a type that will allow for the complete removal of the marker without scarring or disfiguring the pavement. ROADWAY LIGHTING MATERIALS
889.01 General.
Electrical materials shall conform to the requirements given in the current edition of the NFPA 70, "National Electrical Code" (NEC). Electrical materials shall also conform to the standards of the American National Stand ards Institute (ANSI), the National Electrical Manufacturers Association (NEMA), and the Underwriters Laboratories, Inc. (UL), in every case where a standard has been established. All materials shall be "listed" by one or more of these organizations. The m ark of the listing organization shall appear on electrical material and equipment.
889.02 Conduit.
Units of any one item (such as poles, luminaires, lamps, control devices, enclosures, circuit breakers, etc.) shall be made by the same manufacturer.
889.02 Conduit.
a.Rigid Metal Conduit (RMC). Rigid metal conduit, couplings, and fittings shall be galvanized steel, meeting the requirements given in UL 6. Couplings and fittings shall be threaded.
b.Liquidtight Flexible Metal Conduit (LFMC). Liquidtight flexible metal conduit shall meet the requirements given in UL 360. The thermoplastic covering shall be oil resistant.
c.Liquidtight Flexible Non -Metallic Conduit (LFNC). Liquidtight flexible non -metallic conduit shall meet the requirements given in UL 1660.
d.Rigid Nonmetallic Conduit (RNC). Rigid nonmetallic conduit shall be Schedule 40 PVC and shall meet the requirements given in UL 651.
e.Nonmetallic Underground Conduit with Conductors (NUCC). Nonmetallic Underground Conduit with Conductors (NUCC) shall meet the requirements given in UL 1990.
889.03 Lighting Circuit Conductors.
a.General . All conductors in the lighting circuits shall be stranded copper with 600 Volt -AC insulation rating. Insulated conductors shall be Type RHW, RHW -2, XHHW or XHHW -2 meeting the requirements given in UL 44. The size of the conductor, voltage rating, and insulation type shall all be clearly marked on the conductor in a color that contrasts with the insulation color.
b.Conductor Identification Color . Unless designated otherwise by the requirements given in the NEC, conductors shall be identified as follows. Equipment grounding conductors shall be bare or shall be identified by a continuous green color insulation. Grounded conductors (neutrals) shall be identified by continuous white or gray color insulation. Current carrying conductors may be identified by any color insulation other than white, gray or green and shall have a consistent color for each conductor.
c.Splicing and Termination of Conductors . Splices and terminations shall be made with materials which are listed for that pu rpose. Grounding conductors shall be connected to structures using materials specifically listed for grounding.
d.Conductors in Luminaire Poles . The Contractor shall furnish and install the conductors, connectors and fittings in the luminaire poles for supplying power to the luminaries. The required details of the conductors, connectors and fittings are shown on the plans.
889.04 Fuses and Fuse Holders At Breakaway Luminaire Supports.
a.Fuses Fuses for installation within fuse holders for the protection of lighting branch circuits shall be small -dimension cylindrical fuses designed for fast acting current limiting. The fuses shall be rated for 600 volts AC and shall have a UL listed interrupting rating of not less than 10,000 rms symmetrical amperes at rated voltage. Fuses for luminaires shall be rated at 300% of the starting or operating current, whichever is greater, but in no case greater than the branch circuit conductor ampacity.
b.Fuseholders . The fuse holder shall be capable of disconnecting upon sufficient tension in the connected wires, as in a pole knockdown. The fuse shall remain enclosed in the de- energized portion of the fuse holder upon disconnection. The fuse shall not be utilized as the disconnection means; a separate plug and recepta cle shall be utilized for the disconnection means. The fuse holder assembly shall connect to the load -side quick disconnect receptacle.
889.07 Ligh ting Control Center.
889.05 Junction Boxes.
a.Non-Metallic Box . Non-metallic junction boxes shall be made from polymer concrete. With appr oval of the Engineer, slight deviations to a larger size box may be allowed to conform to a standard manufacturer's production size. The cover shall be attached with stainless steel hex -head bolts factory coated with anti -seize compound. A box insta lled at grade shall be capable of withstanding an A16 loading in accordance with the requirements given in ASTM C 857. The box and lid shall be a light gray color to match the surrounding concrete. The box shall be constructed with an open bottom. The co ver shall fit flush with the surface shown on the plans. A box installed in a structure (such as concrete barrier rail) shall have the exposed face of the box flush with the surface of the structure. If the size of the box is not shown on the plans, the mi nimum size shall be 12 inches {300 mm} long by 10 inches {250 mm} wide by 5 inches {125 mm} deep. Conduit openings may be factory cut.
b.Metallic Box . Metallic junction boxes shall be aluminum or stainless steel NEMA Type 4 unless shown otherwise on the plans. A grounding lug shall be provided for the connection of the equipment grounding conductors. Metallic boxes shall be installed only above ground and shall be suitable for surface mounting.
889.06 Service Pole.
Service poles shall be treated in a ccordance with the requirements given in Section 8 33.
889.07 Lighting Control Center.
a.Cabinet . An aluminum identification plate shall be permanently affixed to the outside of the cabinet door. The identification plate shall be sized to provide the message "Alabama Department of Transportation Lighting Control Center *" either etched or embossed in 1 inch {25 mm} high letters. The identification (A, B, C, etc.) of the lighting control center shown on the plans shall be placed on the identification plate where * is shown in the description of the wording required on the identification plate. The letters shall be delineated in black enamel. The control cabinet shall be constructed of 0.125 inch {3.175 mm} thick Aluminum unless shown otherwise on the plans and shall be rated NEMA Type 3R . Each cabinet shall be provided with a 12 gauge steel interior panel for mounting of components. The cabinet shall not be smaller than the minimum dimensions shown on the plans. The cabinet shall be large enough to adequately house all required compone nts with room for arrangement and termination of wiring and room for the inclusion of space for two future lighting circuits. The cabinet door shall be mounted to the cabinet with a continuous hinge, located on either side of the cabinet (right -hand or l eft-hand door opening). The cabinet door shall also have a handle- operated three -point latching system located on the opposite side of the continuous door hinge. The door handle shall contain a “Corbin”, or an approved equal, lock with two keys (keys shall match state keying system). The Contractor shall give the keys to the Engineer when the project has been completed, tested, and accepted.
b.Photocell Control . The photocell shall consist of a metal electrode, molecularly bonded to a ceramic wafer, and coated with cadmium -sulfide. The photo cell shall be highly corrosion resistant without "plastic dipping". Color response of the cell shall be such that a maximum sensitivity is in the blue- green portion of the color spectrum. The photocell shall be of a solid state design. In addition, the photocell shall meet the requirements of UL 773. The "On- Off" switching operations shall be accomplished by a normally closed contact which will be operated by means of an electro -magnetic relay. The response time shall be less than one second time delay for turn -on and three to thirty seconds time delay to prevent the "Turn -off" due to lightning flashes. If the photocell fails, the luminaires shall remain on as a notification of needed maintenance. Over voltage protec tion shall be provided for the control components and the load circuit by the means of an expulsion type surge arrester capable of passing the surge outlined in ANSI C136.10, except follow current is 10,000 A.
889.07 Lighting Control Center.
The base of the unit shall be manufactured on a 3 inch {75 mm} wide, solid thermoset phenolic base. The bottom of the base shall have an integral, locking type, brass 3 prong plug according to NEMA specification SH16 -1962. The gasket shall be of a cross -linked polyethylene to assure moisture proof seal to the luminaire socket. The control must be able to operate over the range of 105 -130V, 60 Hz. AC (120 V Nominal). Its direct load rating shall be 1000 Watts incandescent load and 1800 VA Mercury Vapor, High Pressure Sodium or other H.I.D. load. The control shall be stable and reliable over an operating temperature range of - 65 °F { -55 °C} to 158 °F {70 °C}. Each control furnished shall be calibrated for a "Turn -on" setting of 2.6 footcandles and the "Turn - off" setting shall not exceed 0.6 times the "Tur n-on" setting.
c.Surge Arrestor. The surge arrestor shall be weatherproof. It shall be capable of withstanding a surge current of 50,000 Amps and a surge voltage of 550 Volts.
d.Circuit Breakers . All feeders, branch circuits, and auxiliary and contro l circuits shall have overcurrent protection. The overcurrent protection shall be by means of circuit breakers. Circuit breakers shall be standard UL - listed, molded case, thermal -magnetic, bolt -on type, with trip -free indicating handles. Circuit breakers shall have a UL -listed interrupting rating of not less than 22,000 rms symmetrical amperes at rated circuit voltage for which the breaker is applied (unless otherwise noted on the drawings). Multi -pole circuit breakers larger than 100 ampere size shall have adjustable magnetic trip settings. The number of branch circuit breakers shall be as indicated on the Control Cabinet detail drawing or as indicated in the lighting system wiring diagram, whichever is greater, plus space for 2 spare circuit breakers. Circuit breakers shall be installed so that they will be in sequential order from left to right, top to bottom when the circuit breakers are viewed in the open cabinet. The sequential order shall be based on the identifying designation shown on the plans for each lighting circuit.
e.Contactors . Contactors shall be electrically operated, mechanically held, as specified, with the number of poles required for the service and with operating coil voltage as indicated. Ampere rating of contactors shall be not less than required for the duty shown and shall otherwise be rated as indicated. Contactors shall be complete with a non- conducting inorganic, non- asbestos subpanel for mounting. Contactors shall be mechanically held and shall be complete with coil -clearing co ntacts to interrupt current through the coil once the contactor is held in position. The main contactor contacts shall be the double break, silver to silver type. They shall be spring -loaded and provide a wiping action when opening and closing. The contact s shall be renewable from the front panel, self -aligning, and protected by auxiliary arcing contacts. The line and load terminals shall be pressure type terminals of copper construction and of the proper size for the ampere rating of the contactor. A lever for manual operation shall be incorporated in the contactor. Protection from accidental contact with current -carrying parts when operating the contactor manually shall be provided. The contactor operating coil shall operate at 120 V AC, single phase. The number of lighting contactors shall be as indicated on the Control Cabinet detail drawing or as indicated in the lighting system wiring diagram, whichever is greater, plus space for 2 spare contactors. All contactors shall be connected to the conductors w ith the line side on top of the contactor and the load side on bottom.
f.Ground and Neutral Buss Bars . Separate ground and neutral bus bars shall be provided. The ground bus bar shall be copper, mounted on the equipment panel, fitted with 22 connectors, minimum, of the type shown on the plans. The neutral bar shall be similar. The heads of connector screws shall be painted white for neutral bar connectors and green for ground bar connectors.
g.Interior Power, Lighting and Receptacle . The ca binet shall have an auxiliary device circuit at 120 V AC, single phase to supply a ground fault interrupting, duplex convenience receptacle, a fluorescent cabinet light and photocell for the lighting system. The 120 V, single phase AC power shall be provided by a NEMA 3R rated dry type, 480/120 Volt - AC step -down transformer, not less than 2 kVA, which shall be mounted on the 12 gauge steel interior panel in the cabinet. The auxiliary device circuit, including transformer primary and secondary, shall
889.08 Roadway Luminaire Assembly.
have ov ercurrent protection according to NEC requirements. The fluorescent light shall be a 17 W minimum surface mounted fixture with protected lamp cover and directly connected to a door actuated switch. The receptacle shall be a 20 A, ground fault interrupting, duplex receptacle, in a weatherproof box with appropriate cover.
h.Wiring and Identification . Power wiring within the cabinet shall be of the size specified for the corresponding service conductors and branch circuits and shall be rated RHH/RHW, 600 Vo lts-AC. Control and auxiliary circuit wiring shall be rated RHH/RHW or MTW with jacket, 600 Volts -AC. All power and control wiring shall be stranded copper. When the contract drawings do not specifically indicate assigned wire designations, the manufacture r shall assign wire designations and indicate them on the shop drawings. All switches, controls and the like shall be identified both as to function and position (as applicable) by means of engraved 2 -color nameplates attached with screws, or where namepla tes are not possible in the judgment of the Engineer, by the use of cloth -backed adhesive labels as approved by the Engineer. The cabinet with all of its electrical components and parts shall be assembled in a neat orderly fashion. All of the electrical co nductors shall be installed in a trim, neat, professional manner. The conductors shall be trained in straight horizontal and vertical directions and be parallel, and adjacent to other conductors. Conductors in common paths shall be tied together in a bundl e to reduce the number of loose conductors.
i.Test Switch . The test switch (selector switch) shall be a standard duty maintained contact control station and shall have double break contacts rated for use on 120 volt AC. The switch shall be labeled “Manu al”, “Off”, and “Auto”. Suitable accessories shall be provided for mounting the test switch in the lighting control cabinet.
j.Schematic Diagram . The Contractor shall furnish and install a schematic diagram of the control center wiring for each lighting control cabinet. The schematic shall be overlaid with a 10 mil clear laminate and attached to the inside of the control cabinet door using double stick tape or other approved method. The maximum size of the schematic diagram shall be 11 inches by 17 inche s.
889.08 Roadway Luminaire Assembly.
a.Luminaire .
1.General . The bottom outside of each luminaire shall be marked as shown on the plans or as directed by the Engineer with a permanent marking to provide an identification of the wattage of the luminaire . This designation shall be large enough so that it can easily be seen from the ground after the luminaire is installed. All luminaires shall have a die cast aluminum housing; a weather resistant gray finish coat applied to the housing unless otherwise sta ted; a precision formed aluminum reflector coated to prevent tarnish and corrosion; and a pressed borosilicate glass refractor to provide the IES lighting pattern indicated. All hinges, bolts, nuts, washers, screws and miscellaneous hardware shall be stai nless steel. All luminaires shall have labels indicating it is suitable for use in wet locations, suitable for 40 °C ambient temperatures, and suitable for -40 °C starting. Luminaires other than those shown on the plans may be proposed for use on this proj ect. These luminaires shall produce the lighting levels and ratios shown on the Lighting Design Criteria table in the plans. If a table is not shown, the levels and ratios shall conform to the AASHTO requirements given in the booklet An Informational Guide for Roadway Lighting. Luminaire light distribution classifications are as described in the AASHTO Lighting Design Guide publication
2.Offset Luminaire . The luminaire shall be an offset type roadway fixture specifically designed for roadway lighting. Support shall be by means of a nominal 2 -inch {50.8 mm} knuckle fitter or trunion yoke that allows the luminaire to be easily aimed in both a vertical and ho rizontal direction . The lamp socket shall be provided with a quick disconnect for removal of the reflector/socket assembly. All electrical control components shall be completely removable without tools. A terminal block shall be provided for connection to the power source. The luminaire shall be sunlight
889.08 Roadway Luminaire Assembly.
resistant, shall be provided with 600 V AC rated c onductors , and shall be provided with seals and gaskets to prevent entry of contaminants.
3.Segmented Reflector Luminaire. The general requirements for a luminaire shall be modified as indicated herein for a segmented reflector luminaire only. The housing shall be square or round heavy gauge aluminum with a vinyl coating or equal means of corrosion protection. The tempered clear glass lens shall be gasketed and securely fastened. A gasketed cast aluminum slip fitter shall accept a 2.375 inch {60.33 mm} O.D. pipe for mounting. The housing and slip fitter shall be substantially made to withstand the anticipated wind loads. The entire unit shall be UL listed a s suitable for wet locations and sealed sufficiently to prevent the entrance of insects especially into the lens area. The luminaire optical assembly shall produce an asymmetrical, square, or rectangular pattern as required by its location. The pattern sha ll be field adjustable to provide maximum utilization. The HPS lamp shall mount in a vertical base position and produce a cutoff lighting pattern. The maximum candlepower at nadir for a 400 Watt HPS lamp shall be less than 1250. The angle of peak candlepow er shall be between 63 and 68 degrees in the vertical plane. The ballast shall be easily removable for maintenance and all wiring shall terminate on a terminal strip. The luminaire shall be mounted as shown on the plans. The luminaire shall be designed for a high pressure sodium, clear lamp of the wattage specified in the plans.
4.Light Emitting Diode Luminaire . The housing shall be die cast aluminum with a weather resistant gray finish coat applied to the housing. The luminaire shall be provided with a hinged door assembly underneath the fixture. The door shall contain all of the electronic components with quick disconnect connectors. Input supply wires should not need to be bent or re -routed around components to make the electrical terminations. Only copper wire shall be used to connect electronics within the fixture. No wire nuts shall be used within the lum inaire assembly. The luminaire shall utilize heat sink fins that are integrally cast with the housing to maximize heat transfer and minimize thermal impacts of environmental conditions such as debris clogged fins. Thermal management must be passive with n o fans or other mechanical devices. The luminaire shall have a minimum heat sink surface such that the LED manufacturer’s maximum junction temperature is not exceeded at maximum rated ambient temperature. All exposed hinges, bolts, nuts, washers, screws an d miscellaneous hardware shall be stainless steel. All luminaires shall have labels indicating it is suitable for use in wet locations, suitable for 40 °C ambient temperatures, and suitable for -40 °C starting. The luminaire shall be designed for light -emitting diodes to be mounted on removable modular boards with quick disconnect connectors and mounted to heat sinks using screws. Thermal grease shall not be used. Each LED module shall be fitted with a non- removable lens or individual lenses may be used on each LED die. No additional lens shall be used for the luminaire. All LEDs shall provide the same optical pattern such that catastrophic failures of individual LEDs will not constitute a loss in the distribution pattern. The luminaire shall be protected by an integral surge protection device tested in accordance with ANSI/IEEE standard C62.4 for standard and optional waveforms defined in ANSI/IEEE C62.41.2 location category C (High) for 10 KV Basic Impulse Level (BIL). Both common and differential mode protection shall be provided. The failure mode of the surge protector shall be to turn the luminaire off. The protector shall be field replaceable in the event of failure and shall automatically reset after operation with no manual intervention required. Luminaires shall be provided with a 5 -year manufacturer’s warranty covering replacement and repair of LEDs, drivers and paint finish. The warranty shall not be affected by opening the power door and accessing the electrical cavity. The manufacturer must have tested the luminaire model in a suitable testing program incorporating high heat, high humidity, thermal shock and vibration testing to ensure reliability and substantiate lifetime claims. Luminaire compliance and performance claims shall be independen tly certified by an approved
U.S. Department of Energy National Voluntary Laboratory Accreditation Program (NVLAP) accredited laboratory in accordance with Illuminating Engineering Society of North America (IESNA) LM -79 and LM-80. The luminaire will have l ong term lumen maintenance documented according to the most current version of Illuminating Engineering Society of North America (IESNA) TM -21.
889.08 Roadway Luminaire Assembly.
b.Ballast . The ballast shall be capable of starting and operating one lamp of the indicated size from a 60Hz source at the proper voltage. The ballast shall be in full compliance with the lamp/ballast specifications from the lamp manufacturer. The igniter shall be a “Protected Starter” designed to remove the ballast from the circuit three to ten minutes after la mp fails to ignite; or, the igniter may be a type which directs the voltage spike to the lamp without being circuited through the ballast windings. A cycling or extinguished lamp shall not adversely affect the igniter or ballast which shall have an expect ed life exceeding five years in normal use. The ballast design center shall not vary more than ± 5% from rated lamp watts for nominal line voltage and nominal lamp voltage. The lamp wattage regulation spread at any lamp voltage, from nominal through end of rated life, shall not exceed 35% for ± 10% line voltage variation. The ballast must reliably start and operate the lamp in ambient temperatures down to - 40 °C for the rated life of the lamp. The ballast primary current during starting must not exceed no rmal operating current. The ballast shall be capable of sustaining lamp operation with a line voltage dip or sag of 35% for up to 4 seconds when operating a nominal voltage lamp with nominal line voltage applied to the ballast primary. The line power fac tor of the lamp/ballast system shall not drop below 70% for ± 10% line voltage variations at any point in the lamp life.
c.Light Emitting Diode Driver . The driver shall be capable of starting and operating the LED modules of the indicated size from a 60Hz ±3 Hz source at the designed voltage ±5%. The driver output shall not vary more than ± 5% from rated output watts for nominal line voltage and nominal lamp voltage. Driver shall have a minimum power factor of 90% and a maximum Total Harmonic Distortion (THD) of 20% at full power output. The operating frequency should be high enough to avoid visible flicker in the light output. The driver shall be UL certified for use in dry or damp locations. Driver life expectancy shall be 50,000 hours at 80 ° C and 10 0,000 hours at 70 ° C. The driver will not be adversely affected by the cycling or failure of one or more LED modules during the life of the driver. The driver must reliably start and operate the lamp in ambient temperatures from - 40 °C to 40 ° C for the rat ed life of the lamp. The driver shall be capable of sustaining LED operation with a line voltage dip or sag of 35% for up to 4 seconds.
d.Lamp . Each luminaire shall have a clear high pressure sodium (HPS) lamp of the required wattage installed. Average lamp life shall be 24,000 hours. Initial lumen output shall be: 70 Watts - 5,800 lumens 400 Watts - 50,000 lumens 100 Watts - 9,500 lumens 600 Watts - 92,000 lumens 150 Watts - 16,000 lumens 250 Watts - 28,000 lumens
e.Light Emitting Diode . Each LED should be rated for a minimum operational life of 50,000 hours at 40 ° C and comply with IESNA L -85 standards at 20 ° C ambient temperature. Photometry must be in compliance with IESNA LM - 79 when operating at an ambient temperature o f 25 °C. The LED module shall lose no more than 10% optical intensity when operating at 40 ° C than its initial delivered lumens at 25 °C. All LED modules shall be constructed so that the failure of one LED will not result in the loss of the entire luminaire and so that modules can be replaced without replacing the entire luminaire. Each LED die or the LED module should be enclosed in a non -removable transparent lens of either glass or acrylic. The LED module shall produce a nominal correlated color temperature of 4000K ±275K with a color rendering index of at least 70 and a minimum output of 80 lumens per watt efficacy.
f.Roadway Luminaire Lowering Device .
1.Reliability Of Lowering Device . Any lowering device proposed for use shall have been prov en reliable through previous acceptable performance. Lowering devices that are unreliable and have excessive maintenance costs in previous installations will not be approved for installation. Upon request by the Engineer, the Contractor shall furnish a lis t of at least ten installations, locations, and telephone numbers of persons to contact to verify the performance of the lowering device. Any delays in the progress of construction due to the Contractor's failure to furnish the requested information concer ning the proposed lowering device shall be the responsibility of the Contractor.
889.09 High Mast Luminaire Assembly.
2.Required Configuration Of Lowering Device . The lowering device for a roadway luminaire assembly shall be configured to simultaneously raise or lower two or more luminaires that are attached to a single rigid assembly. All exterior metal components of the lowering device shall be of corrosive resistant materials including stainless steel, aluminum, or galvanized steel unless otherwise specified. Other metal parts of the lowe ring device shall be of the quality recommended by the manufacturer for the proper functioning of the device. The lowering device shall be capable of being latched at the top of the luminaire assembly to take the load of the luminaires and mounting hardwar e off of the cables at the final mounting height. The latching system shall be designed to impart no more than one G of force to any component of the roadway luminaire assembly. The lowering device shall have a centering mechanism that will reliably keep t he orientation of the luminaires in the proper position at all times until final latching is complete. The raising and lowering shall be accomplished by the use of a portable winch and motor assembly that is connected by cord and plug to the electrical power for luminaires. The winch shall have a gear reduction assembly to allow a smooth, slow raising and lowering operation. The raising and lowering shall be accomplished by the use of stainless steel aircraft cable(s). The number of required cables shall be determined by the lowering device manufacturer. Each cable shall have at least 7 strands of 19 wires. The Contractor shall provide one portable winch and motor assembly for State retention. The safety factor for the winch, motor, cables, raising and lowering assembly, and mounting hardware shall have a loading capacity of at least five times the weight that is carried by the cables.
e.Luminaire Poles and Pole Foundations . The details of the luminaire poles and foundations are shown on the plans. Ad ditional requirements are given in Sections 718 and 891.
f.Breakaway Supports . A frangible base that meets the requirements given in NCHRP 350 shall be installed on each luminaire assembly when shown on the plans. Breakaway Couplings will be allowed if s hown on the plans. The Contractor shall assure the compatibility of the pole base, breakaway support, and foundation.
889.09 High Mast Luminaire Assembly.
a.High Mast Luminaire . The lighting distribution requirements for a high mast luminaire shall be th e same as those given for a roadway luminaire. Each high mast luminaire shall consist of cast aluminum housing, built in ballast and a one piece reflector assembly. The housing shall contain a slip fitter for a 2 -inch {50.8 mm} horizontal pipe tenon which allows adjustment for leveling. All ballast components shall be accessible from the top with the luminaire mounted and aimed. The ballast shall be pre -wired to a terminal block using quick disconnect fittings. The luminaire and ballast shall be from th e same manufacturer. The optical assembly reflector shall be borosilicate glass encased within a spun on, sealed aluminum cover or a formed aluminum reflector with a chemically bonded lightweight non -breakable 95% silica glass finish. The reflector shall be designed to direct light away from the lamp arc tube. The lamp shall operate in the vertical base up position. If an enclosed and filtered optical assembly is shown to be required on the plans it shall include a hinged lens ring and a heat/impact -resistant flat glass lens held in place by four spring clamps. The luminaire shall provide the ANSI/IES type distribution as required by the plans and have a minimum efficiency of 69% of base lamp lumens in the 0 -90 degree zone. Lamps shall be the same as those required for a Roadway Luminaire Assembly. The performance requirements for ballast shall be those given for a Roadway Luminaire Assembly.
b.Light Emitting Diode High Mast Luminaire . The requirements for a light emitting diode high mast luminaire shall be the same as those for a light emitting diode roadway luminaires. The housing shall contain a slip fitter for a 2 -inch {50.8 mm} horizontal pipe tenon which allows adjustment for leveling. All drivers and internal components shall be accessible f rom the top with the luminaire mounted and aimed. The driver shall be pre -wired to a terminal block using quick disconnect fittings. The luminaire and driver shall be from the same manufacturer.
889.09 High Mast Luminaire Assembly.
The requirements for high mast light emitting diodes shall be the same as those required for roadway light emitting diodes. The requirements for light emitting diode high mast drivers shall be the same as those given for a light emitting diode driver.
c.High Mast Luminaire Lowering Device .
1.Reliability of Lo wering Device . Any lowering device proposed for use shall have been proven reliable by satisfactorily performing its function. Failure to operate properly or undue maintenance costs history in previous installations shall be grounds for disqualification of a particular product. Upon request, a list of up to ten installations, locations, and telephone numbers of persons to contact to verify this shall be provided. Any delays in the project schedule due to meeting these requirements shall be the responsibili ty of the Contractor.
2.Required Configuration of Lowering Device . Each high mast l luminaire assembly shall be furnished with a lowering device, suitable for lowering a luminaire mounting ring, which will allow the complete luminaire and associated electr ical and mechanical apparatus to be serviced from not more than 5 feet {1.52 m} above the base plate. The luminaire mounting ring shall be raised and lowered by multiple stainless steel wire rope cables each of which shall be capable of supporting the enti re mounting ring assembly under design wind loading conditions. The wire rope cables shall be stainless steel with each cable having at least 7 strands of 19 wires. The power feed conductors shall be terminated in an aluminum or stainless steel NEMA 4 jun ction box using strain relief conductor clamps. "Kellums" type grips are not acceptable. The luminaire ring shall provide a totally enclosed wireway in which to route the conductors to each luminaire mount. An approved means shall be provided to insure smo oth and non -damaging travel up and down the pole. The ring shall be securely positioned in its final location at the top of the pole. The drive assembly for each high mast luminaire assembly shall consist of a single or twin drum at least 20 nominal wire rope diameters in size. It shall have an AGMA rated winch assembly with sufficient reduction to obtain self -locking when traveling in either direction. The use of sprockets and chains will not be accepted. The winch shall be driven by a drill motor or oth er motor equipped with a torque limiting safety clutch and a remote operator on a minimum 15 foot {4.57 m} long cord. Power for the motor shall be obtained through the circuit breaker conductors using an appropriate step- down transformer with a matching c onnector. The drive unit and complete lowering assembly shall be designed for the operator to raise the ring to the point the safety clutch begins to slip without damage to the mounting ring, the wire rope cables, or the pole top assembly. The Contractor shall provide one electric motor and lowering apparatus for State retention. Minimum thread diameters of the sheaves over which run the lowering cables shall be at least 25 times the nominal rope diameter. The nominal rope diameter of nylon jacketed wi re rope shall be the core or unjacketed rope nominal diameter. The sheave grooves shall be semi -circular in cross section. The radius of the groove shall be one -half the nominal diameter of the rope plus 1/64 th of an inch {0.397 of a mm}. Provisions shal l be made to prevent the lowering cables from leaving the sheave grooves. All components and hardware shall be galvanized or stainless steel.
3.Latch Device. All latching devices shall be at the top of the pole. The pole top latch shall hold the loweri ng ring securely in position at the top of the pole by means of three symmetrically placed latches located on the head assembly with flags to indicate the locked or unlocked position. Each of the three latches shall latch and unlatch independently of the o ther two latches.
4.High Mast Poles and Foundations. The details of the high mast poles and foundations are shown on the plans. Additional requirements are given in Sections 718 and 891.
890.01 General.
SECTION 890 TRAFFIC SIGNAL EQUIPMENT
890.01 General.
The following are the requirements for traffic signal equipment. These requirements may be supplemented or amended by the requirements given elsewhere in the proposal, on the plans, and on the details in the Special and Standard Highway Drawings. Requirements specified in these specifications shall comply with the latest editions of the NEC, and NESC. All equipment shall conform to the requirements of these specifications. Where cited Standard Publications and these specifications differ, the requirements of these specifications shall govern. For purposes of these specifications wherever the following terms or abbreviations are used, the meaning shall be interpreted as follows: A Amps AC Alternating Current ANSI American National Standards Institute ASTM American Society for Testing Materials AWG American Wire Gage DC Direct Current Hz Hertz IMSA International Municipal Signal Association ITE Institute of Transportation Engineers LED Light Emitting Diode MUTCD Manual on Uniform Traffic Control Devices NEC National Electrical Code NEMA National Electrical Manufactures Association NESC National Electrical Safety Code UL Underwriters Laboratories V Volts VA Volt Amps W Watts Descriptions and definitions of the equipment, words, and terminology used in these specifications are given in the MUTCD, the NEMA TS 2 -2016 Standards Publication, ITE publications, and the NEC.
890.02 Controller Unit.
Regardless of controller asse mbly type, all controller units shall be Advanced Transportation Controllers (ATC) conforming to this specification.
a.General Requirements. Advanced Transportation Controller (ATC) shall conform to the controller standard ATC 5201 v06.25 or later and requirements outlined in this specification. Where this specification and cited standards differ the requirements of this specification shall govern. Advanced Transportation Controllers used by the Alabama Department of Transportation (ALDOT) shall be on the MSDSAR.
b.Functional Requirements. The controller shall be NTCIP conformant for its application, conforming to the mandatory functional requirements of the latest NTCIP standards, unless otherwise specified. For the controller to be compliant with these specifications, the controller shall comply with the Protocol Requirement List (PRL) for the project. The PRL will indicate which mandatory and optional NTCIP functional requirements shall be required. A Protocol Implementation Conformance Statement (PICS) shall be supplied by the manufacturer with the material submittal to verify compliance with this specification and to indicate NTCIP functional requirements supported by the controller. The controller Application Programming Interface (API) shall conform to the API standard ATC 5401v02.17 or later. The controller shall be supplied with a printed and bound operations manual/maintenance manual containing circuit component schematics and programing instructions.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 820–828 of 934.