Tom/Barb wrote:
ScottG wrote:
Of course you have an open ground. Your ground isn't supposed to be bonded and none of that matters anyway. A GFCI doesn't trip because of an "open ground".
Somewhere, you have a leakage to ground. Could be a wet outside receptacle, bad fridge heater *even if it works fine) or water heater or even a bad microwave (rare). I would unplug the appliances and see if the fault remains.
If that was his problem, plugging it at home would pop the breaker.
not unless his breaker at home is a GFI breaker. not real common especially on a 30A 120V circuit. low current leakage to ground does not make a normal breaker trip.