BFL13 wrote:
Yes there was a chance it got the outside receptacle wet driving home in the rain the other day. That would be too easy, but fingers crossed. Whatever it is, I will find it eventually :(
One thing is I can only fix this at home on shore power. Off-grid at our seasonal site, the trailer is on inverter power or sometimes Honda gen power ( with its floating neutral). So there would be no way to confirm the fault has been found, because it won't pop with those power sources.
You can test it with the generator by bonding the neutral to ground. Refer to
this post.