I have a MH with 30A Hardwired Surge guard Mod:34520, it suddenly won't let power into the RV, I know the reasons, Over/ Under voltage, Reverse Polarity & such, I've checked volttage at the source, (the plug receptacle) I get 120V between the Black & White, & 0 volt between White & green, which is good, when I plug the cord in & check voltatage at the IN side of the Surge Guard, I get the 120v between the B&W, but then I also get 120V between W&G, which is NOT good, does this mean a bad cord Suddenly, or a bad Surge Guard?
After waiting for the 2 min delay the Surge Guard clicks & the is only 74.6 volts on the output side,then trips the source breaker.
2007 Forester 2941DS
2014 Ford Focus
Zamboni, Long Haired Mini Dachshund