To please a couple of the more pedantic characters in this thread, in
the interest of full disclosure I thought I'd explain how it is I am
hardly inexperienced.
I am installing a light fixture. When I took the old light fixture
off I noticed in the ceiling that there was a black wire that came in
and was tied to another black wire that continued the run. From my DC
days I know the black wire to be ground, so I spliced into it and
attached the light's green wire.
I think the fixture is faulty because when I connected it's white wire
to the white wire in the ceiling I felt a little funny. But my
circuit breaker is also faulty because it threw right away.
Downstairs I couldn't get the breaker to stay in one position, it was
that worn, so I put a self-tapping screw direction through the top of
the switch to hold in the on position.
Light works! But buzzes & flickers horribly. Lots of noise in the
breaker box too. I'm blaming the switch upstairs....it's the only
thing left. I know that it isn't a 3 way switch because it only goes
two positions, so I'm not quite sure what is going on here. I can't
even guess what the red wire up there is for.
There's always some wire left behind in all my installations....you
know how it is.
Please ignore my previous reply. You MUST be a troll.