I switched the circuit to a breaker that was working, and it still tripped. I tried the wet vac in another AFCI circuit and it worked fine. There is nothing else plugged into the circuit, since no one is living there yet. I don't have a megger. Got to be something in that wall that is snagging the wire as it goes down or something they haven't discovered yet that's in the fireplace that triggers the AFCI's
It's a mystery UIAIW (unidentified alien in wall) :0
