[RFI] CHECK your grounds.

[Larry Benko]

  Rick,

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.

73,
Larry, W0QE

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
> ground.
>
> Rick N6RK
>
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