Posted by John T on September 05, 2011 at 15:25:19 from (173.243.181.15):
In Reply to: Re: OT---Generator GFCI posted by George Rausch on September 05, 2011 at 10:47:24:
Actually to expand a bit, a torroidal core surrounds the HOT and NEUTRAL. If all the curent flowing out the hot is returned by the neutral theres no voltage induced into the coil so no trip HOWEVER if ANY of the current flowing out the hot is getting returned elsewhere (an equipment grounding conductor,,,,,,,,,,or your body via its contact with mother earth,,,,,,,,,,,or your body via its contact with the neutral,,,,,,,,,or the hot is in contact with a grounded metal case of a tool BASICALLY ANYWHERE BUTTTTTTTTTTTTTT THE NEUTRAL) theres a current imbalance and voltage is induced into the coil making the GFCI trip.
Its not really like two conditions, ITS ANY CONDITION whereby the Neutral current does NOT equal the hot line current and it only takes like 5 millimaps of difference to induce sufficient voltage into the torroidal coil to trip the breaker.
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