Originally Posted by yellowf4
Yes, the voltage goes up between the trailer skin and earth ground while the shore cord is still plugged in. Yes, the main breaker. Yes, the same thing with generator power and the same shore cord.
What am I looking for when you say check for continuity between the ground on the cord and the skin of the trailer? What should I be set on and what should I expect to see? I'm using a digital fluke meter...
Do you have a Digital Multi Meter? If so there is a setting that you can touch the two leads together and the meter will beep.
Take one lead and hold it on the ground post of the shore cord plug. While still holding the lead on the ground post take the other lead and touch it to an exposed metal part of the trailer frame. There should be a connection and the meter should beep.
If you do not have a digital multi meter then you can use an older analog meter on the ohm setting. You should have a low resistance reading. Not a zero or high reading.
If your meter beeps during this test we will have to look deeper. Do you by chance have an 120v inverter in the trailer?
If your meter does not beep then you will have the check the ground post to the ground conductor where it terminates in the main electric panel in the trailer. If that does not beep then you have a bad plug or cable. If it does beep then you have to check from the electric panel to the trailer frame. If this beeps we have to go deeper. If it does not beep you have an open between the electric panel and the frame.