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Street lights circuit breaker intermittent tripping issue

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    #16
    If you have an ammeter that can record maximum current, you might be able to narrow it down to whether it's a short or an overload.

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      #17
      In line with Cows comments. We, test, locate fault, cut open bad spot and repeat before making repairs. We had some underground to a pivot this late summer that had only one ‘open’ but so many other faults it wasn’t worth the repair.
      Tom
      TBLO

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        #18
        You can also rent meggers, if you don’t have enough use to justify buying one. Another test that usually works well, but better at 480 volts, is to use your amp clamp to enclose all of the circuit conductors (both hots and neutral, if line to neutral loads are used), you should get zero amps if there is no fault to ground present. If you do get an amp reading, use the divide and conquer method as others have said to narrow it down.

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