ktmrfs wrote:
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ALL a GFCI requires is an IMBALANCE between the hot and neutral, AND if a GFCI detects a ground/neutral bond downstream of the GFCI it will trip.
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Ground/neutral bond is UPSTREAM of the GFCI(s), bonded at the source. Yes, the GFCI monitors an imbalance of the current flow between the hot pin and the neutral pin of that GFCI device. Ground fault (imbalance) means there is a connection between neutral and ground DOWNSTREAM of that GFCI device allowing some current flow to be diverted around the GFCI device and going back to the source. That means there is less current flowing thru the neutral pin than thru the hot pin. But the “leakage current” flow requires a closed circuit back to the source neutral. And that closed circuit is via the ground path to the neutral bond at the source, or with both the power source and the load side being independently grounded to earth so that earth provides that path. If there is no path from ground to the source neutral, there can be no “leakage current” flow and therefore no imbalance.
