donn0128 wrote:
Multiple GFCIs dont play well together. Try plugging it into a normal, non GFCI outlet and see what happens.
That is not really true—you don't know which one will trip first in a fault condition, but otherwise there is no problem in general. Besides, the poster only has the one GFCI in use.
If it trips when the main breaker is on in the RV but all the other breakers still off, the problem seemingly must lie somewhere in the main distribution panel. I'd inspect the wiring there carefully (with everything unplugged and turned off, of course) for loose wires, ground wires touching something that isn't the ground bus bar, etc.
Even if everything seems to work on a non-GFCI outlet, please check to be sure you don't have a problem. Ground faults can (particularly in combination with other problems) lead to deadly voltages where you don't expect them.
