[tonycook]

I sometimes plug my trailer into a GFI outlet. As soon as it is plugged in, the GFI outlet is tripped. I figure the GFI is sensing that the common and ground are connected somewhere in the trailer. My thoughts are that the common and ground are connected in the breaker box in the trailer. (I can't check that now because I'm at work and won't get home until the morning.) Is there any danger in disconnecting the common from the ground? I would leave the common and ground circuits complete to the power inlet that connects to the power pole or generator.

Thanks,
Tony

[Machine]

GFIs are designed with a balance-checking circuit to sense whether there is any differential in the current going out on the hot lead versus the return path of the neutral (e.g. 'other' path).

I don't know AC trailer wiring - why would the ground and neutral be connected in the trailer? I know that in household electricity, you want only one main grounding point between the neutral and ground. Seems that if your trailer has that connection also that there would be a ground loop, which is 'usually' bad.