6-107 to prove excessive, the Contractor shall use soapstone powder o r listed cable pulling lubricant as a lubricant. Where two or more cables are to occu py the same conduit, they shall be drawn in together and kept parallel to each other by t he use of a pulling head. No aluminum wire shall be installed underground for primary and se condary wiring. Both ends of each length of cable shall be sealed to prevent th e entrance of moisture during shipment or during outdoor storage. Defective and damag ed cable will be rejected and shall be replaced at no cost to the State. Secondary wiring shall be installed as shown on the plans. Sec ondary wiring shall not be spliced underground. Splicing shall only occur in above gro und hand holes and transformer bases. The wire for secondary circuits, which is p ulled through ducts, shall be fed slack from the feed end. Secondary wiring being pulled thr ough a junction box shall be provided with enough slack for the center of the cable to be po sitioned a minimum of one
1.foot outside the top of the junction box Cables in junction boxes shall be provided with enough slack fo r the center of the cable to be positioned a minimum of one (1) foot outside the top of t he junction box and shall be arranged as directed. After cables have been installed, the en d of each section of cable in Light Standards and panel boxes shall be carefully sealed with DAC Heavy Duty KWIK Foam Polyurethane Sealant, Minimum Expanding or an approved equ al. Sealant shall penetrate a minimum of four (4) inches into the conduit. All w iring shall be finished to provide a neat and orderly appearance. Ends of cable not conne cted to any device shall be insulated and sealed. There will be no underground splicing of power conductors. The trench for direct-buried cable shall be excavated to the wi dth and depth shown on the plans or as directed. Placement of the sand bedding sha ll be coordinated with the ins tallation of the cables. After the cables and screened sand have been placed, the remain der of the trench shall be promptly backfilled with selected excavated material. Surplus material shall be disposed of as directed and the surface of t he trench shall be loamed and s eeded in accordance with Sections 615 and 618. When connecting sockets, outlets and other similar equipment, t he most accessible bare parts of each piece of equipment shall be connected to the grou nded neutral. In order to ensure this has been done, each piece of equipment shall be tes ted after installation, under the supervision of the Resident, with a test lamp or other inst rument, one leg of which has been connected to a definite ground, or by other approved means of testing. All cables in junction boxes and Light Standards shall be teste d for circuit connections, which shall be in conformity with those indicated on the plans. After verification of circuit connections, all cables in junction boxes, light standards and service panels shall be 6-108 provided with individual metal tags, die-stamped with a phase d esignated A or B, as applicable. The tags shall be securely attached to the cables. Splices to form continuous circuits shall be made by the Contra ctor and will only be permitted in accessible above ground locations. All other spli ces shall be made with approved crimp-type connectors. Conductors shall not be pulled into conduit until pull boxes ar e set to grade, crushed rock sumps installed, grout placed around the conduit, concrete bottom of pull boxes placed and the metallic conduit bonded. Where roadways are to remain open to traffic and existing light ing systems are to be modified, the existing lighting system shall remain in operatio n and the final connection to the modified circuit shall be made so that the modified circuit will be in operation by nightfall of the same day.
634.05 Erecting Light Standard To provide continuously aligned lamp post installations,
Light Standards shall be located in accordance with the details governing the spacings and setbacks shown on the plans, unless otherwise directed. The bracket arms shall be set normal to the edge of the roadway , unless otherwise directed. The bracket shall be assembled and attached to the s haft before the light standard is erected. If it is anticipated that there will be a period i n excess of 24 hours between the erection of the Light Standards and the installation of the lum inaires, the Contractor shall install a weight, weighing between 50 to 75 pounds, at the outb oard end of each bracket arm. This weight shall be designed and fastened in such a way that it will not pose a hazard to persons or vehicles passing beneath it. Light Standards shall be erected in a vertical position, with a maximum deviation from the vertical of ¼ inch in 5 feet, using either the leveling nut s provided with the anchor bolts or the breakaway couplings. Once the Light Standard is in its final position, the top nuts shall be tightened as follows:
a.Anchor Bolts with Breakaway C ouplings The manufacturer's rec ommendation shall be used.
b.Anchor Bolts without Breakaway Couplings the nut shall be t ightened to snug tight condition by utilizing the full effort of a worker using a stan dard spud wrench or comparable tool. After all nuts have b een brought to a snug tight conditi on, each nut shall be tightened an additional 1/3 turn using an i mpact wrench, torque wrench or large crescent wrench. A minimum of 2 bolt threads shall project beyond the outside fa ce of the nut. Nuts for bolts other than anchor bolts shall be tightened as ou tlined under b. above, for anchor bolts. 6-109 The bottom of all transformer bases shall be coated with a bitu men-mastic, epoxy paint. When foundations and anchor bolts for Light Standards have been installed by others, the Contractor shall verify the anchor bolt dimensions at each location so that bases will be furnished with the proper bolt holes. Wires in the shaft shall be supported with a Kellum-type, braid ed, strain-relief grip attached to a "J" hook mounted inside the shaft near the top. Wood Ornamental Light Standards shall be installed as shown on the plans. 634.051 Removing Light Standards Before removing Light Standard s, the luminaires shall be removed from the Light Standards and disposed of as no ted on the plans. Care shall be exercised in removing and transporting the Light Standards. The Contractor will be required to replace, at their expense, all e quipment damaged or destroyed by their operations. 634.052 Portable Power Unit for Lowering Luminaires The number of portable electric power units with remote control required for operation of the h igh mast luminaire lowering system, will be 1 for every 10 high mast poles, or as shown on the plans.
634.06 Luminaires Luminaires shall not be installed until the l amp socket position has
been inspected and approved for c onformance with the manufactur er's recommended position for the specified distribution. All luminaires shall be adjusted to produce the maximum illumination on the roadway surface and shall be full I ES cutoff. The connections between the luminaires and connector kits shall be made with single conductor, number 12 wires AWG copper stranded THHN, minimum si ze. A 14 inch long Teflon sleeve shall be placed over each end of each conductor i n the luminaire. Installation of a connector kit, fused or non-fused, shall be i n accordance with the manufacturer's instructions to pr ovide watertight connections. 634.061 Under-Bridge Lighting Under-bridge lighting shall be in stalled in accordance with the plans and specifications, or as directed. Circuits shall be fused in fuse boxes with 5-ampere cartridge-t ype, midget fuses, ⅜ inch diameter and 1½ inches long, unless otherwise indicated on the plans. Wiring connections in the under-bridge lighting units shall be made with 300°F wir e. All under bridge lighting, luminaires shall be installed and ad justed for maximum illumination of the roadway surface. The beam angle shall be a djusted as indicated on the plans. 6-110 In vehicular undercrossings, underpass lights shall be placed i n operation as soon as practicable after falsework has been removed from the structure . Lighting for pedestrian structures shall be placed in operation before opening the stru cture to pedestrian traffic.
634.08 Service The Contractor shall install metal conduit rise r with entrance cap,
entrance switch, multiple control relay, and other equipment as shown on the plans. The lighting system will be supplied with electrical power by t he local power company. The type of service will be single phase, three wire, 240/480 v olt or the voltage indicated on the plans, 60 hertz, alternating current. The meter trim will i nclude a bypass handle to allow the power company to change the meter without disconnecting the power. An external, standalone breaker capable of shutting off the lighting control cabinet or signals will be provided to disconnect power to the control cabinet. No power shall be routed in or out of the control cabinet before this breaker The power company will make all connections of the roadway lighting system cables at the power company's service p ole. The Contractor shall notify the power company at least two weeks in advance of the t ime they intend to start construction at each of the sites and shall make all necessary arrangements with the power company for the required installation. Roadway lighting cabinets shall be installed on stub poles with doors accessible from the roadway. All connections to equipment and terminals shall be n eat and orderly conforming to the requirements specified. Details for the fabrication and installation of service poles w ith cabinets and other equipment are shown on the plans. Transformer enclosures used to protect overhead type transforme rs mounted on concrete pads shall be installed as shown on the plans. Transformers wi ll be furnished by the power company. All meter mounting devices shall be installed so that the meter s will be upright (plumb). They shall be installed with the top of the meter not less than 48 inches nor more than 60 inches from the floor to the final grade. Exceptions to this he ight requirement will be made where special permission has been given to install group or mod ular metering, overall metering enclosures, or pole-mounted meters. Level grade shall be maintained for a minimum of 3 feet in front of the meter enclosure to provide a safe working space. In order to meet this requirement on uneven terrain, as an option, the C ontractor may install a pressure-treated wood platform. For any non-residential (industrial or commercial) self-contain ed meter socket the by- pass requirements are single phase, 100 or 150 amp, single hand le lever operated. The Contractor shall meet all requirements and regulations of U tility Companies when installing equipment on their poles and for the service connect ion. It is the responsibility of the Contractor to contact the appropriate Utility to determine their specific requirements. 6-111 634.081 Bonding and Grounding All metal conduit ends, Light St andards, luminaires, control cabinets, and exposed noncurrent carrying metal parts o f fixed equipment shall be connected to the grounding c onductor. All grounding and bondin g shall conform to the current provisions of the NEC.
634.09 Testing Before acceptance of the work the Contractor sh all cause the following
tests to be made on all lighting circuits, by a licensed electr ician. The tests do not need to be performed in the presence of the Resident, but the test results shall be recorded on the Highway Lighting Quality Control Check List and submitted to th e Resident by the Contractor for acceptance. The form shall be signed by the lic ensed electrician certifying that the highway lighting meet the requirements of section 634. 09.
a.Continuity Each circuit shall be tested for continuity.
b.Ground Each circuit shall be tested for grounds.
c.Resistance The resistance to ground on non-ground conductor s shall be at least five megaohm at 60°F measured with a 1,000 volt megger. The ground resistance shall not be more than 25 ohms.
d.Voltage Voltage readings shall be made at each service pole , in the load contractor, with load and without load, and at each fixture with load.
e.Current Current readings shall be made on the load side of each load contractor phase and neutral. Readings shall be made at night with lighting sys tems in normal operation.
f.Test Data Electrical test data obtained from the above test s shall be furnished in writing.
g.Operational Test The Contractor shall conduct an operationa l test for the completed installation under normal operating conditions. This operation al test shall have a duration of not less than two full days. The Resident shall be the sole au thority to judge the adequacy of the length of the testing period in order to assure the satisfa ctory operation of the entire system or any of its sections. The work will not be accepted u ntil the operational test has been successfully completed.
h.Functional Test With all equipment connected to the wiring system, a functional test shall be performed by the Contract or, in the presence of the Re sident, to demonstrate that the system and all parts thereof function as specified. All de fective materials or faulty installations shall be corrected by repairs or replacements by the Contractor to the satisfaction of the Resident at no additional cost. Lighting circuits shall be subjected to such other tests as may be required and it shall be the responsibility of the Contractor to ascertain what tests ar e required and to perform these tests in the presence of the Resident. All tests shall be perf ormed at the expense of the Contractor. Cost for power to conduct tests shall be paid by t he Contractor. 6-112 634.091 Acceptance All systems shall be complete and in operat ion to the satisfaction of the Resident at the time of acceptance of the work. The Contractor shall be responsible for the proper performance in service, in whole or in part, of the various lighting systems and all other electrical installations furnished and installed under this Contract and shall correct, at their own e xpense, all deficiencies in the operation which may arise prior to acceptance of the work. The Contractor shall be responsible for the cost of power until the work is accepted. 634.092 Method of Measurement Highway lighting system will be measured by the lump sum. Light Standards will be measured by the single unit, complete i n place and accepted. The quantity of luminaires for high mast lighting will be measu red by each single unit. 634.093 Basis of Payment The accepted quantity of Light Standa rds will be paid for at the contract unit price each for the number of units of the res pective types. Payment shall be full compensation for the Light Standard and breakaway transfor mer base or breakaway device, bracket arm and all incidentals necessary to complete t he work, including design of the Light Standards. Conduits, junction boxes, and foundations will be paid for under Payment for furnishing and installing luminaires for high mast lighting will be made for the accepted quantity at the contract unit price each, which sh all include luminaire, ballast, lamp, and incidentals necessary to complete the work, including design of the high mast lighting. The accepted highway lighting system will be paid for at the co ntract lump sum price for the complete lighting system shown on the plans, except that lu minaires for high mast lighting and Light Standards will be paid for at the contract u nit price each. Lump sum payment for highway lighting system shall be full comp ensation for furnishing, installing and erecting: ballast, lamps, wiring in underground conduit, pole wiring, and all other wiring (excep t prewired conduit), transfo rmer enclosures, luminaires (except luminaires for high mast lighting), break-away devices when applicable, all identification tags, and all materials, labor, equipment, tools , miscellaneous hardware and incidentals necessary to complete the work. Payment shall also include removing and resetting light standards, installing breakaway devices on exis ting poles, disposing of unused light standards, as noted on the plans, and for furnishing port able electric power units. No separate payment will be made for bonding, grounding and gro und rods; these costs shall be included in the contract price for conduit, light stan dards, service panels, or other items requiring bonding and grounding. 6-113 Trenching for direct buried cable will be incidental to highway lighting system and shall include excavating, furnishing and placing screened sand and ba ckfilling. Payment will be made under: P a y I t e m P a y U n i t 634.160 Highway Lighting L u m p S u m 634.164 Luminaires for High Mast Lighting E a c h 634.2041 Luminaires E a c h 634.206 Light Standard for Post Top Luminaire Each 634.207 High Mast Light Standard E a c h 634.209 Wood Ornamental Light Standard E a c h 634.210 Conventional Light Standard E a c h SECTION 637 - DUST CONTROL
637.01 Description This work shall consist of controlling du st that results from
traffic on the project and the C ontractor’s operations by apply ing water and/or calcium chloride as directed by the Resident. The requirements of Spec ial Provision 656 and other pertinent Sections of the Standard Specifications will apply.
637.02 Materials The water shall not be salt or brackish and shall be free from oil,
acid and injurious alkali or vegetable matter. The calcium chloride shall conform to Subsection 712.02 except that the requirements for total alkali chloride and impurities shall not apply.
637.03 Sprinkling Water shall be applied by approved methods and with equipment
including a tank with a pressure pump and a nozzle-equipped spr ay bar.
637.04 Calcium Chloride Calcium chloride shall be used when a uthorized for
controlling dust on the roadway under construction and on appro ved haul roads from the pits to the project or in the area of dwellings and where dust const itutes a hazard to traffic. Calcium chloride shall be applied by mechanical spreaders or by hand at the rate designated.
637.05 Method of Measurement Water for sprinkling will be me asured by the 1,000
gal in calibrated tanks or distributors or by accurate water me ters. Calcium chloride will be measured for payment by the number of tons satisfactorily applied. Delivery slips as specified in Section 108.1.3-f will be requi red except that weight for calcium chloride shall be determined from the weight stated on each bag and the number of bags used.
Source: Maine Standard Specifications for Road and Bridge Construction, 2020 Edition. Pages 577–583 of 817.