814Electric Lighting Systems and Traffic Signals

- ELECTRIC LIGHTING SYSTEMS AND TRAFFIC SIGNALS ELECTRIC LIGHTING SYSTEMS AND TRAFFIC SIGNALS

814.1DESCRIPTION

Install electric lighting systems and traffic signal items as shown in the Contract Documents. B I D I T E M S U N I T S Electric Lighting System Lump Sum Electric Conduit (*) (**) Linear Foot Electric Service Box Each T r a f f i c S i g n a l L u m p S u m Traffic Signal Interconnect Lump Sum Emergency Vehicle System Lump Sum Loop Detector Replacement Linear Foot Loop Detector Replacement (Set Price) Linear Foot *Size **Type: Metallic or Non-metallic, no entry denotes either is allowed.

814.2MATERIALS

comply with DIVISION 1700. Provide all parts necessary to complete th e electric lighting system or traffic signal or modify existing systems. Before starting any construction activities, submit for the Engineer’s approval, a schedule of all equipment and materials for the highway lighting syst em or traffic signal. Submit 7 copies of catalog cuts, diagrams and drawings to the Bureau of Transportation Safety and Technology. The Engineer will accept or reject the equipment or materials within 2 weeks. For concrete foundations, use Grade 3.0 concrete that complies with SECTIONS 401, 402 and 1102, and steel reinforcement that complies with DIVISION 1600, unless shown otherwise in the Contract Documents.

Provide straight standards with a maximum variation of 1 inch at the mid-point of 30 to 45-foot standards and ¾ inch at the mid-point of 20 to 30-foot standards. A maximum static deflection (without wind load) of 4 inches is permitted for poles less than 30 feet in height and 4 ½ inches for poles 30 feet or greater in height. Measure static deflections with mast arms and luminaries in place. The design of the standard, the mast arm and method of attaching the mast arm to the standard must be approved by the Engineer.

owner. The information necessary to contact the owner is shown in the Contract Documents. The Engineer will accept the materials ba sed on catalog cuts and visual inspection.

replacement, the Engineer may approve th e addition of loop detector replacements at the set price. The Contract Documents may designate loop detector replacements at the set price. Provide materials that comply with the specifications of the loop detector owner. The information necessary to contact the owner is shown in the Contract Documents. The Engineer will accept the materials ba sed on catalog cuts and visual inspection.

814.3CONSTRUCTION REQUIREMENTS

• National Electric Code. • National Electric Safety Code. • Regulations of the National Board of Fire Underwriters. - ELECTRIC LIGHTING SYSTEMS AND TRAFFIC SIGNALS • Rural Utility Service (RUS) • Illumination Engineers Society (IES) • Standards of the American Society for Testing and Materials (ASTM) • American Accommodation Policy • Local ordinances. • Details in the Contract Documents. Before starting any work on existing street lighting an d circuits, obtain daily safety circuit clearance from the serving company. Before beginning work, pull cut-out plugs and warning signs posted at cut-out boxes.

complete the electrical system or traffic signal or modify existing systems as shown in the Contract Documents. All utility hookups are subsidiary, unless shown otherwise in the Contract Documents.

of such plates to ⅛ inch radius.

to existing structures and right-of-way. Remove the existing concrete foundations (including anchor bolts) to the elevation shown in the Contract Documents. Limit the excavation for the conduits, f oundations and other appliances to that necessary for the installation of the equipment and materials. Do not excavate until immediately before installing the equipment and materials. Place plastic warning tape (12 inches below the surface) directly over conduit. Place excavated material where no damage and obstructi on to vehicles and pedestrian traffic will occur. Do not impede surface drainage. At the end of each day’s work and at all times wh en construction operations ar e suspended, remove all equipment and other obstructions from the portion of the roadway open for use by public traffic.

of the structure. Compact the backfill using pneumatic tampers, vibratory compactors or other equipment approved by the Engineer. Compact the backfill to comply with the Contract Documents. If backfill requirements are not specified, compact each layer until no further consolidation is observed. Remove surplus excavated material from the project and dispose on sites approved by the Engineer. Reseed the areas disturbed by the excavations. Hand seeding methods may be used.

improvements removed or damaged during installations of the lighting systems or traffic signals. Replace or reconstruct the removed or damaged improvements with the same type and quality of materials originally used. If part of an existing slab of concrete pavement or square of si dewalk is removed or damaged, replace the entire slab or square.

conduit ends and anchor bolts securely in the proper position when the concrete is placed. Cure the concrete foundations with wet burlap or polye thylene for a period of 72 hours. Prevent concrete temperatures from falling below 32ºF. Do not attach poles until the concrete has cured for 14 days. If a foundation can not be constructed as shown in th e Contract Documents because of an obstruction, the Engineer will determine how to construct the foundation. - ELECTRIC LIGHTING SYSTEMS AND TRAFFIC SIGNALS

foundation anchors are screwed into the ground, make sure they are plumb. The pole base of the screw-in foundation anchor shall be level when the installation is complete. Use the connectors to make minor leveling adjustments on poles with breakaway connectors. Use galvanized or cadmium plated shims or washers (maximum thickness ¼ inch) to make minor leveling adjustments on other types of poles. Only 1 shim or washer is allowed on any 1 anchor bolt, with a maximum of 2 shims or washers on any pole.

Contract Documents. Backfill the resulting holes according to DIVISION 200. Dispose of the removed foundations and anchor bolts.

shown in the Contract Documents. If desired, use larger size conduit at no additional cost to KDOT. Use the large size conduit for the entire length of the run from outlet to outlet. Do not use reducing couplings. When PVC or HDPE is specified, install according to the manufacturer’s instructions. When steel conduit is used, ream the ends of all conduits to remove burrs and rough edges. Make field cuts square and true so the ends will match for the full diameter. Do not use slip joints or running threads for coupling conduit. Use an approved threaded union conduit, if a standard coupling can not be used. Before couplings are made up, paint threads on all conduits with a rust preventative paint. Fit and ti ghten all couplings until the end of the conduits are brought together. Paint any damaged coating on conduit with rust preventative paint. Thread and cap all steel conduit ends with standard pipe caps, until wiring is started. When caps are removed, provide threaded ends with approved conduit bushings. Except factory bends, use conduit bends with a radius of greater than or equal to 6 times the inside diameter of the conduit. Where factory bends are not used, make conduit bends without crimping or flattening, using the longest radius practicable. Mark the location ends of all conduit for future electrical circuits in structures with a "Y" a minimum of 3 inches high cut in the face of curb, gutter or wall directly above the conduit.

Contract Documents, install the electrical conduit on straight lines and cover with compacted earth. Place conduit as shown in the Contract Documents.

pavement by approved jacking or dr illing methods. Do not dist urb pavement without written permission of the Engineer. Keep jacking or drilling pits 2 feet clear of the edge of any type of pavement. TABLE 814-1: JACKED CONDUIT DEPTH Location Condition Minimum Depth Pavement 36 inches below top of pavement. Trenches on shoulder and in park areas 36 inches below natural ground level. Finished surface in street areas 36 inches below the street surface.* Railroad tracks 42 inches below top of tie. *Conduit may be laid on top of and secured to the existing pavement in curbed dividing strips.

towards the base opening where transformer bases are used. Locate conduit entering through the bottom of a pull box near the ends to leave the major portion of the box clear . Terminate conduit entering concrete pull boxes 2 inches inside the box wall and 2 inches or greater above the bottom and slope to facilitate pulling of cable. At all outlets, enter the conduit from the direction of the run. For conduit carried through existing culverts or bridge structures, pick up the trenched cable for 3 feet in the ground and run up the face of the culvert headwall to the nearest upper corner or top, through the culvert, down the opposite headwall and into the ground for 3 feet. Fasten conduit to concrete surfaces by means of approved clamps and fasteners. Clean existing underground conduit to be incorporated into a new system with a mandrel, and blow out with compressed air. Conduit runs shown in the Contract Documents may be changed with approval of the Engineer to avoid underground obstructions. - ELECTRIC LIGHTING SYSTEMS AND TRAFFIC SIGNALS

boxes may be used at the Contractor’s expense.

an expansion joint in the structure. Provide each expansion fitting with a bonding jumper of No. 6 A.W.G. copper wire or equal.

Do not splice cable in conduit or outside of pull boxes, splice boxes or standards, unless shown in the Contract Documents. When not fastened to existing structure or carried through conduit, lay conductor cable to the depth shown in the Contract Documents. Use powdered soapstone, talc or other approved lubricant when inserting conductors in conduit. Pencil, trim to conical shape and roughen conductor insulation before applying splice insulation. When conductors and cables are pulled into the conduit, tape all ends to exclude moisture until the splices are made or terminal appliances are attached.

conduit and metal standards to form a continuous system, and effectively ground. When an open system such as an overhead wiring or direct burial underground is used, effe ctively ground only standards and service points, except where conduit runs used under pavement cross a water system. Install ground electrodes as shown in the Contract Documents.

by the owner.

814.4MEASUREMENT AND PAYMENT

If shown as a bid item in the contract, the Engineer will measure electrical conduit by the linear foot from the outside edge to outside edge of service boxes, junction boxes or traffic light footings. Excavation, removal, backfilling and Grade 3.0 concrete are subsidiary. The Engineer will measure electric lighting systems, tr affic signal installations, emergency vehicle systems and traffic signal interconnects by the lump sum. The Engineer will measure each electric service box. The Engineer will measure the loop detector replacemen ts by the linear foot of saw cut required for the installation. Payment for "Electric Lighting System", "Electric Conduit", "Electric Service Box", "Traffic Signal", "Traffic Signal Interconnect", "Emergen cy Vehicle System" and "Loop Detector Replacement" at the contract unit prices and "Loop Detector Replacement (Set Price)" at the set price is full compensation for specified work.