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Run: Traffic Signal Loop Splice and Megger Test Inspection

Document loop splice locations, home-run terminations, loop resistance, and insulation resistance to ground for traffic signal installation and acceptance te...

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Inspection Details

Enter the project number, intersection name, or site identifier.
Document when the inspection and testing were performed.
Record the qualified inspector or competent person performing the test.
Identify the specific lane, approach, or detector loop location being tested.
Reference the applicable work order, permit, plan sheet, or as-built drawing.
Select the inspection context for this record.

Safety and Test Preconditions

Confirm the work zone is protected per the approved traffic control plan.
Verify the detector circuit is isolated and safe to test before using the megohmmeter.
Confirm the megohmmeter or insulation resistance tester is in calibration and appropriate for the circuit.
Verify the loop circuit is disconnected from the controller or detector input before insulation testing.
Confirm required PPE is being used, including eye protection and any arc-flash or roadway PPE required by the site conditions.
Confirm weather and site conditions allow safe and reliable testing.

Loop Wiring and Splice Verification

Verify the loop conductor path is continuous from the loop to the home-run termination.
Confirm all splice locations are documented and can be identified on the record or as-built sketch.
Enter the total number of splices associated with this loop circuit.
Verify the home-run termination point is identified, labeled, and traceable to the detector lead-in.
Select the splice method used and confirm the enclosure or seal condition.
Attach photos or a marked-up sketch showing loop routing, splice points, and home-run path.

Electrical Test Results

Record the measured loop resistance.
Record the megohmmeter reading from the loop conductor to ground.
Enter the test voltage applied during the insulation resistance test.
Record the time allowed for the reading to stabilize before recording the result.
Confirm the measurement was taken with the correct conductor isolated and the other lead on ground.
Indicate whether a baseline reading was taken before installation or prior to repair.

Acceptance, Deficiencies, and Closeout

Select any observed issues requiring correction.
Indicate whether corrective action is needed to resolve any deficiency.
Select the final disposition of the loop circuit after inspection.
Sign to certify the accuracy of the inspection record.

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