I actually emailed the guy that wrote the noshockzone web site and he agrees its a grounding issue with shore power.. I have a properly grounded extension cord coming from the gfci on the house it plugs into an adapter that then plugs into my camper 30 amp cord. Everything works perfect on the camper and never trips a breaker the, I noticed this problem last camping trip last year. I'm going to check everything this afternoon with my fluke volt meter along with buying a good dog bone adapter. Hopefully this fixes my issue any other thought are welcome I'll.report back later when I check all this out. Thanks everyone