Mike had mentioned in the past that some RV’s will trip a GFCI due to minor current leakage from all the electrical appliances and devices connected to the same pedestal circuit that is powering them. I think it was one of the main reasons for the NEC dropping the idea of requiring GFCI for 30-amp pedestal receptacles. From my point of view, it can be an easy test, but not one that will help locate a neutral-ground connection fault. All one needs to do is shut their main circuit breaker off, including all inverters and generators, and use some kind of dog bone adapter to plug their 50- or 30-amp RV into a 15- or 20-amp GFCI protected electrical outlet. If the RV trips the GFCI (main circuit breaker off), there may be a ground-neutral fault that deserves further investigation. If, however, the GFCI does not trip, there might still be some ground to neutral leakage, however, in my opinion, it is not sufficient to be overly concerned about. Mike might disagree and no neutral to ground leakage is acceptable, although that is not my opinion where small leakage currents exist.
Mike had mentioned in the past that some RV’s will trip a GFCI due to minor current leakage from all the electrical appliances and devices connected to the same pedestal circuit that is powering them. I think it was one of the main reasons for the NEC dropping the idea of requiring GFCI for 30-amp pedestal receptacles. From my point of view, it can be an easy test, but not one that will help locate a neutral-ground connection fault. All one needs to do is shut their main circuit breaker off, including all inverters and generators, and use some kind of dog bone adapter to plug their 50- or 30-amp RV into a 15- or 20-amp GFCI protected electrical outlet. If the RV trips the GFCI (main circuit breaker off), there may be a ground-neutral fault that deserves further investigation. If, however, the GFCI does not trip, there might still be some ground to neutral leakage, however, in my opinion, it is not sufficient to be overly concerned about. Mike might disagree and no neutral to ground leakage is acceptable, although that is not my opinion where small leakage currents exist.