Hello all, I hope you're all keeping well.
I have a question regarding insulation resistance testing.
Whether doing a single circuit IR test or a global IR on an entire installation, I usually try to remove all loads, eg lamps, neons etc, but obviously this isn't always possible. So I generally join both L+N and test to earth. This is to avoid damaging any sensitive equipment by ensuring no potential difference across the load.
But how come I still can get a bad reading on a circuit while testing this way? I don't fully understand. Is it due to certain loads being able to throw up a bad IR reading and others not?
Any help would be greatly appreciated
I have a question regarding insulation resistance testing.
Whether doing a single circuit IR test or a global IR on an entire installation, I usually try to remove all loads, eg lamps, neons etc, but obviously this isn't always possible. So I generally join both L+N and test to earth. This is to avoid damaging any sensitive equipment by ensuring no potential difference across the load.
But how come I still can get a bad reading on a circuit while testing this way? I don't fully understand. Is it due to certain loads being able to throw up a bad IR reading and others not?
Any help would be greatly appreciated