GFCI and an Open Ground
Given: A 120 VAC GFCI supplying power to a 30 AMP RV. The RV has one problem, the 3rd Prong Ground wire at the 30 AMP plug is not making connection. (The RV chassis is floating because there are no ot...
Forum Discussion
ktmrfs wrote:
also, remember that a GFCI will NOT provide 100% protection against electricution. If you are across hot and neutral AND insulated well enought from any ground path, a GFCI won't trip. Example. in the trailer no stab jacks down, dry ground, rubber soled shoes and you get across hot and neutral. Good chance there is not a good enough ground path to cause a GFCI to trip.
Same thing in a house. rubber shoes on dry hardwood or vinyl floor and you get across hot and neutral. good luck.
That's right, this fault already exists in every system, so it's not a net-new risk when the RV is floated relative to shore supply.
I have a scenario where I am feeling virtually compelled to float the RV from shore, and my plan is to apply a GFI/RCD to mitigate the new risk this introduces. That's why I'm posing this hypothetical. If the GFI truly mitigates the only meaningful new risk, then I'm good to go. If not, I need to reevaluate.
