Stray Voltage?
My RV has a stray voltage problem, and I'm wondering if anyone has any good ideas on how to find or fix the problem. My daughter complained to my wife that she thought she was getting shocked when ...
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So far when I was reading the prongs on my 50a power cord, I got a .5ohm reading from the ground/round prong to the bare metal on the RV (a bolt on a compartment door hinge) that I was testing from, so according to a few posters it should be good if less than 1ohm. When connecting from the groud/round prong and trying to read through to the other prongs on the plug I was reading infinite. I do have a transfer switch/surge protector built into the RV and it may have been shut off as it only seems to click once the breaker is turned on.
Using a compartment door hinge, unless it is connected to the frame, is a poor contact point.
One of the first measurements I'd be looking for would be continuity from the male ground pin on the shore cord to the female ground on the other end. This will verify that you have a complete ground path through the cord and eliminate one suspect.
Next spot would be the integrity of the load center-> frame ground. Loosen the attachment fastener, spray some penetrant on the fastener and lug, turn back tight. If you remove the fastener completely you can also measure for voltage or current from the removed load center cable to frame, if plugged in. If you measure any voltage above above 2V, you have a wiring or device problem in the trailer.
These ground fault problems can be tedious. You may have to remove ground wires from each circuit to narrow where a fault is located. The cheap RV receptacles are known for losing connectivity with wires just sitting in the walls.
Best of luck with your ground problem.
