Lightning damage Insulation resistance test
Lightning damage Insulation resistance test
(OP)
For making a spot IR test (good/not good) on circuits in a residence, wouldn't it be OK for the general purpose circuits to disconnect the lighting fixtures and leave the wall outlets (with no load) and closed light switches in place? If this combination did not test above about 1 megohm, then the outlets and the switches would need to be pulled and each cable run tested separately. Thanks





RE: Lightning damage Insulation resistance test
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Lightning damage Insulation resistance test
RE: Lightning damage Insulation resistance test
Years ago, we had a nearby lightning strike. It tripped the main 200A breaker. After the storm passed, I reapplied main power and found one 15A circuit breaker tripped. When I turned that back on, there was a flash and puff of smoke from the outlet box. Called the Fire Dept to make sure there wasn't any fire. Later found that the insulation was damaged where the cable entered the box.