Last evening I inspected a house in which one of the bathroom GFCI outlets had a tiny (0.01 V) voltage from the neutral to the ground when the outlet was on, according to my voltmeter. There was no voltage when it was off.
I tested it with the voltmeter it because it had difficulty re-setting, and showed “open neutral” on the regular outlet tester when the reset didn’t engage.
Since the neutral and ground should connect at the panel, what is the explanation for this?
It does not seem to be nearly enough voltage to indicate a hazardous condition, and I’m not one to make mountains out of mole hills. It seems to me its origin is in the GFCI outlet itself, perhaps in the switching mechanism.