PERFORMANCE AND OPERATIONAL TESTS FOR HIGHWAY LIGHTING AND TRAFFIC SIGNALS 801.04 PERFORMANCE AND OPERATIONAL TESTS FOR HIGHWAY LIGHTING AND TRAFFIC SIGNALS
801.01 Description
This work consists of providing labor, equipment, appliances, and materials to install and test highway lighting and traffic signal systems. Ensure the electrical work conforms to NEC except where su perseded by the Contract requirements.
801.02 Materials
Within 30 days of receiving notice to proceed, submit a list to the Resident Engineer of materials to be used on the project that are listed on the QPL. For materials not listed on the QPL, submit two (2) hardcopies of a complete materials schedule and proposed equipment, including catalog cuts, diagrams, drawings, and other data, along with a New Product Evaluation Request form to the Resident Engineer for approval. Provide materials and equipment to meet the Contract requirements. The Resident Engineer may waive the submittal requirements for materials and equipment listed on the Department’s QPL. Deliver the manufacturer’s instruction manual for the maintenance, timing, and operation of traffic control equipment to the Resident Engineer after completing the traffic signal systems work. Provide a signal system wiring diagram and a parts list with each controller. Provide galvanized hardware in accordance with AASHTO M 232, Class C coating. Provide new, standard, and manufactured electrical and mechanical equipment. Provide the same class of equipment from a single manufacturer. Provide guarantees and warranties in accordance with Subsection 106.11, “Guarantees and Warranties.”
801.03 Equipment
Provide specialized test equipment, tools, electrical diagrams, and labor required to perform tests for highway lighting and traffic signals.
801.04 Construction Methods
A.General Determine exact locations of electrical energy supplies in the field. Make arrangements with the utility provider to complete the service connections. Notify the Resident Engineer at least 48 hr before testing. The Resident Engineer will notify the city, county, or other agency responsible for supplying the electrical power for the planned testing procedures.
801.04 Performance and Operati Onal Tests for Highway Lighting and Traffic Signals
Provide 60 -cycle, single -phase, 480 V electrical supply and circuits for highway lighting, unless otherwise required by the Contract. Ensure the lighting electrical supply and circuits are multi -grounded neutral for multiple connections of luminaires, with automatic photoelectric control to turn the highway lights on at dusk and off at dawn. Supply the 480 V lighting circuits from a primary system through a distribution transformer and con trol equipment. Provide 60 -cycle, single -phase, 120 V electrical supply and circuits for permanent and temporary traffic signals and flashing beacons, unless otherwise required by the Contract. Provide 60 -cycle, single -phase, 480 V electrical supply and ba llasts for highway sign lighting.
B.Bonding and Grounding Provide mechanically and electrically secure conduit, poles, and cabinets to form a continuous system. Provide at least No. 10 AWG copper wire for bond and ground jumpers. Provide at least No. 8 AW G copper wire for ground poles, securely attached to the pole and the ground rod, as shown on the Plans. Provide at least No. 6 AWG copper wire for grounding conduit and neutral grounding conductors at service locations.
C.Electrical Field Testing Before starting functional testing, test each circuit for continuity and grounds. Ensure the ground rods have a resistance to ground no greater than 25 Ω after installation. With the Resident Engineer present, conduct an insulation resistance test at 500 V (DC) on each circuit between the circuit and the ground. Ensure insulation resistance of at least 10 MΩ on all circuits. Do not test insulation resistance with magnetometer detector devices. The Department will not allow splices to be made in the condulet or junction box adjacent to the magnetometer before testing on the lead -in conductors between the splice and the controller cabinet field terminals. Submit the written test results to the Resident Engineer.
D.Electrical Functional Tests Notify the govern ment agency with jurisdiction over the system at least 24 hr before starting functional tests on traffic signal systems. Do not allow the new and existing traffic signal systems to operate simultaneously. Operate conventional and high -mast lighting systems and traffic signal systems continuously for 24 hours to determine if system parts function properly. Place the electrical system into service and inspect immediately for defects. Inspect the system during the test period at intervals directed by the Resident Engineer. During the functional test, throw safety switches to verify proper operation as required by the Contract. Switch photoelectric controllers from auto to manual and back to auto during the night portion of the test to observe the response o f the photoelectric controller. After the 24 hr test period, the Resident Engineer will inspect the complete electrical system to ensure normal operation and to check for proper fixture and equipment installation. ELECTRICAL CONDUIT 802.02 Perform tests on sign lighting systems, flashing beacons, and electro -mechanical changeable message signs if connected to the permanent power source. If not connected to the permanent power source at the time of installation, provide temporary power to each device to show proper installation and operation for approval by the Resident Engineer.
E.Mechanical Test After the 24 hr functional test, operate high -mast lighting systems and observe the system at night for six days. Look for defects in the luminaire or lamps. Demonstrate the proper fun ction of lowering devices to the Resident Engineer by completing one lower and raise cycle on each assembly.
F.Defects Correct defects as directed by the Resident Engineer at no additional cost to the Department.
G.Existing Traffic Signal Equipment Do no t remove, disconnect, or otherwise disable existing signal equipment until the functional test on the new equipment is complete, and approved by the Resident Engineer for continued use.
H.Covering of Signal Indications Before making the new signal equipme nt operational, cover signal heads (installed but not lit) with an all -weather bag; do not cover the “walk/don’t walk” indications. Do not allow the new and existing systems to be visible to traffic at the same time.
801.05 Method of Measuremen T — Vacant
801.06 Basis of Payment
The costs of functional tests required by the Contract to be included in the contract unit prices for the relevant lighting and traffic pay items. SECTION 802 ELECTRICAL CONDUIT
802.01 Description
This work consists of providing and installing electrical conduit, junction boxes, fittings, expansion devices, and miscellaneous hardware for electrical conduit.
802.02 Materials
A.Conduits and Fittings Provide conduits and fittings in accord ance with Section 709, “Electrical Conduit.”
B.Junction Boxes Provide junction boxes with gaskets and covers of the size and type shown on the Plans.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 805–806 of 935.