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bukhrn's avatar
bukhrn
Explorer III
Jun 19, 2016

Electric Problem

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.
  • time2roll's avatar
    time2roll
    Nomad
    Jun 19, 2016
    Yes check the cord for issues. Most likely at one end or the other unless it has been damaged.
  • Houston_Remodel's avatar
    Houston_Remodel
    Explorer
    Jun 20, 2016
    Have you checked the end of the cord for voltage between the white (neutral) and the ground ?
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Jun 20, 2016
    Sounds like the plug is mis-wired

    You should have 3 wires in the cord, and hopefully they are color coded

    White, Black and Green

    The plug should have 3 screws One dark copper (Black wire) one Aluminum silver (White wire) one Green, I'll let you figure that out.

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