ScottG wrote:
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.
No, it would not because a GFCI fault is not an overload.
OP, another thing that can cause it is a failing converter. I would turn off its breaker and see if it still trips the GFCI.
It is easy to determine if it is the trailer. read continuity between the two hot legs and the Common ground of the plug, it should be open to both.