I test for ground faults on a lot of single wire conductors that are run along metallic racking. When testing conductor insulation integrity, we normally isolate all condutors and test with a megger set at 1000V. We attach the red lead to the conductor and the black to the ground which is bonded to the racking. This test works well mot of the time, but sometimes the ground fault is caused by rain and by the time we are able to get to the site and test, the rain has dried up and the fault has cleared, all megger results are good. Will testing the conductor with one lead on the copper and one lead on the insulation show all damaged conductors? Is there another test that will reveal all compromised conductors?
Thanks,
Paul
Thanks,
Paul