Recently an old time electrician call me, and since we were good friends,
he want to show me something he does, before connection, the Power
Circuits also call home runs, to the electrical panel circuit breaker./
Here were only talking about single pole breakers.
One breaker feed a stranded duplex receptacle.
The 2nd. breaker feed to the line side of a GFCI duplex receptacples.
This is was one of those D.I.Y. wiring jobs, were the D.I.Y. didn't want
to tie in all the circuits into the electrial panel. So he call old Pete,
and Pete, said okay.
Here what Pete does before connecting a circuit to the electrical panel/\.
He wire nuts the end of NM-B cable to a cord set without a female end.
He then ties white/white, black/black & ground/ground and plugs it into
a normal breaker receptacle. This was a test. If the circuit pass this
this test, he would then plug the circuit into the receptacle protected
by a GFCI. So far on this job, 90% of the circuits were passing.
But when I arrive at his job, he said watch this. He plug into normal
receptacle, and it pass this part of his test. NOW, when plug, into the
GFCI protected receptacle, the GFCI click off.
Then Pete look at me and said, D.I.Y.'s only care that the circuit will bring
power to the light outlets and the power receptacles, they don't care
of they wire the electrical properly.
Pete found the problem. Correct the wiring, and the GFCI test receptacle
held this time.
Pete would tell me what he did, he said I should go home and study, and
tried to come up with a answer.