ELECTRICAL TESTING SECTION 843
522 SECTION 843 — HIGHWAY LIGHTING ELECTRICAL TESTING
843.1Description.
This work consists of electrical testing for highway lighting systems .
843.2Materials.
Not applicable.
843.3Construction.
include a 1 -year warranty of the highway lighting system installed under the contract. The highway lighting system includes all items of work performed under the contract to provide lighting of roadways, bike paths, parking lots, or other areas.
junction wells, cables, load centers, transformers, cabinet pads, pole bases, poles, high mast poles, light standards with and without davit arms, luminaires, service installations, and reworked or relocated existing lighting facilities.
requirements, state and local laws, and ordinances governing the work.
Submit a copy of the master electrician’s license to the engineer for approval.
local regulations.
electrical installations.
beginning each test. Include a written certification stating when the testing equipment was last calibrated. Ensure the calibration date is within 180 calendar days of the date of testing. Perform all tests in the presence of the engineer. 843.3.1 Ground Resistance Testing.
earth tester with a 0.50 to 500-ohm scale or digital read -out. Ensure the resistance is 25-ohms or less.
Perform the test when the soil is dry. Do not add any chemical or salt solutions to any portion of the grounding system.
unless otherwise determined by the engineer. Drive 2 auxiliary copper clad ground rods into the ground a minimum of 3 -feet apart.
approve the spacing. Isolate each ground rod or foundation ground with the bond wires disconnected when performing the test. Ensure the resistance to groun d is 25 -ohms or less. Perform 2 ground resistance tests unless noted otherwise in the contract. HIGHWAY LIGHTING ELECTRICAL TESTING SECTION 843
523 843.3.2 System Testing.
for lighting installations.
follows:
Test underground circuits for resistance to ground with a megger before and after burying the conduit and wiring and after placement and connection of ground rods. Inspect, repair, and retest circuits with measurement readings less than 10 -megaohms to ground
lighting structures. The Department will not accept cable insulation with resistance measurement readings less than 10 -megaohms at 500 volts DC.
the fault is in a conductor between terminal connections, replace the conductor. If the fault is at a terminal connection, repair or replace the terminal device.
repair. If a circuit fails the insulation resistance test and water removal allows the circuit to pass, replace the conductors and re -test the new circuit. Allow a t least 1 -minute between circuit testing and any re -test.
unspecified grounds, and that all circuits are properly connected.
main breaker. The tolerance for readings with load is +/- 5 percent of nominal voltage. Take voltage readings at the last light of each circuit. The Department will accept a voltage reading if it is within 5 percent of the reading with load at the supply point.
in the control cabinet. The Department will accept a current reading if it does not exceed 80 percent of the breaker rating.
test on the lighting system. The burn -in test consists of normal dusk -to-dawn operation of all lighting system control equipment and apparatus to ensure function without interruption or failure. Conduct the burn -in test at the same time for all lights energized from the same utility company service point. The Department will not accept burn -in test of individual circuits or groups of lights.
failures occurring during the test period. Make necessary repairs or replacements and then retest the repaired portion of the system.
HIGHWAY LIGHTING ELECTRICAL TESTING SECTION 843
524 1. After energizing the lights for the minimum 2 -week burn -in period, arrange a night -time inspection with the Department’s master electrician to determine the optical qualities of each luminaire.
system. Submit test procedures to the engineer for approval 2 -weeks before conducting the test. Submit 4 copies of the test results to the engineer. 843.3.3 Inspection.
system. Ensure that this inspection agency is independent and licensed to operate in the State of Delaware, having no affiliation with the Department o r the contractor.
components of the lighting system.
Department will not allow energizing of the lighting system until receipt of a certification document. The Department will not conduct its final electrical inspection until after receipt of the inspection agency’s certification document. The Department will also require the inspection agency to submit a cut -in card to the utility company before energizing the service.
night acceptability, considering all the possible defects listed in Section 843.3. If the highway lighting system is defective because of abnormal operation or deterioration, as listed in Section 843.3, the Department will require repair or replacement of the defective equipment.
4 As-Built Plans
showing the location of all buried electrical circuits, with lighting system elements dimensioned from fixed objects or from survey stations.
Include in the as -built plans the project plan and detail sheets, with changes shown.
Keep a daily record of where the items are placed to ensure the accuracy of the as -built plans. 843.3.5 Highway Lighting System Warranty.
Submit the warranties or guarantees to the engineer upon final acceptance of the completed highway lighting system. In addition to the manufacturer’s warranties o r guarantees, provide a warranty for the complete, installed highway lighting system for 1 calendar year beginning at the initial acceptance of the highway lighting system.
any of the following conditions by visual inspection or by inspection with testing equipment within the warranty period: HIGHWAY LIGHTING ELECTRICAL TESTING SECTION 843
525 1. Non -operational lamps or ballasts;
equipment installation;
with this specification, including all highway lighting systems and components within the project limits. Begin highway lighting system repairs immediately following notice of the lighting system defect unless weather limitations prevent the corrective work. Provide notification to the Department before beginning corrective work.
correction of the deficiencies noted during the primary inspection . Provide a maintenance bond for item 843001 – Electrical Testing upon substantial completion. Provide a maintenance bond meeting the following requirements:
paid to the contractor;
naming the contractor as the principle;
by the Delaware Department of Insurance.
843.4Method of Measurement.
Not applicable.
843.5Basis of Payment .
will constitute full compensation for:
HIGHWAY LIGHTING ELECTRICAL TESTING SECTION 843
526 7. performing necessary corrective work. ITEM DESCRIPTION UNIT 843001 ELECTRICAL TESTING LS EMERGENCY PREEMPTION DETECTOR SECTION 844
527 SECTION 844 — EMERGENCY PREEMPTION DETECTOR
844.1Description.
This work consists of providing, assembling, wiring, and installing emergency preemption detectors on a mast arm or span wire.
844.2Materials.
Equal.
844.3Construction.
mounting hardware.
preemption detector in accordance with the contract. Attach the 4 -conductor detector cable to the 4 terminal screws within the emergency preemption detector unit, in accordance with the manufacturer’s specifications.
different color to denote the direction of the detector as follows: