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
wnjj wrote:BB_TX wrote:
OK, my head is starting to hurt. After all the reading I still cannot grasp how the circuit can detect a fault between the neutral and an open (not connected) ground. So I will just accept that it happens. I was a systems engineer with little experience at the circuit level, so that may be my weakness here.
If by open ground you mean a fault between neutral and ground inside an RV with no 3rd pin ground on the power cord and absolutely no path from the chassis to earth, it cannot dectect that......
I guess that is where I was losing it. The OP stated he did not have a ground at his power cord leading to a floating ground in the RV. And being an RV there is no other normal path to ground. But later posts stated a ground was not required to detect a neutral to ground fault in a GFCI. And I was lost from that point.
