GFI electrical question
I acquired a 2018 cruiser aire 28fd in October. Using it here in AZ this winter, I noticed that while using 50 amp generator power the bathroom gfi outlet which controls a couple more in kitchen are...
Forum Discussion
theoldwizard1 wrote:Allworth wrote:
GFI needs a hard ground.
Not true !
GFI works by measuring the current flowing in and the current flowing out. It trips if they are not equal.
GFI can be used in old houses with no grounds (requires that the outlet be labeled as not grounded).
This is correct. However, there must be some ground path back to the power source for the GFCI to be able to have a discrepancy between the current in the hot pin vs the current in the neutral pin. The GFCI works on the principle that that there is some current "leaking" out of the circuit. For there to be any current flowing outside the circuit in question, there must be some path for that current to flow back to the source. Electricity requires a closed path to flow. If that path does not exist, then current can not "leak" out of the circuit. In old ungrounded homes, that ground could be plumbing at the various sources of water.
