joebedford wrote:
OP here: I checked my cables and adapters and they read essentially 0 ohms (one read .1 ohm). Unfortunately I was not able to check the receptacle before I left that location.
Now I'm at home and the rig is plugged into a GFCI receptacle that I know is wired correctly.
I repeated the original scenario and the reading is 2.2VAC from frame to damp earth. No buzz between knee and forearm this time.
In my opinion, 2.2VAC on a properly GROUNDED RV is too much. Because the GFCI is not tripping we can assume the GROUND CONDUCTOR current is less the 10 milliAmps. This implies we have a ground loop resistance of R = E / I = 2.2 / 0.01 = 220 OHMs. If we assume there is no SIGNIFICANT current flowing through the real earth then the GROUND WIRE would imply to be 220 OHMs. That would be too much resistance in my mind. If Wayne Dohnal says I am out to lunch then I would believe him! :)
