You are absolutely correct. GFCIs only sense the differential current
between the HOT and NEUTRAL lines. Any imbalance greater than ~5mA
causes a trip. The current that causes the imbalance can flow to the
green wire ground or to any leakage path at all and the GFCI does not
know or care.
On 1/26/2011 7:20 PM, Rick Karlquist wrote:
> K8RI (Roger) wrote:
>> I'd add that the green wire is needed for ground fault breakers and
>> outlets to work.
> I don't see why a GFCI circuit should need a green wire
> to work. It should be able to detect an imbalance between the
> neutral and phase currents independently of what is going on with
> Rick N6RK
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