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Uncoiler 07-08-2012 12:05 AM

2 Ceiling light wiring question?
 
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Ok I messed up today & got interupted by out of town company in the middle of replacing my ceiling light and box, now I can't remember where a couple wires should go.

There are 9 wires coming into this box, 3 black, 3 white, 3 ground. Here is what I am fairly certain of. There are two black wires in the Mar connector. Of the two the one on the right is live when the breaker is on, the one on the left continues that onto and electrical plug in the wall. The two white wires in the Mar connector were wrapped together just as they are now. The three gound wires were screwed to ground screws in the box.

That leaves the one black and one white wire sticking out and pointing to about 3 o'clock in the pic. I thought these two were connected to together with another Mar, but I'm not 100% certain. With the breaker off I used my ohm meter to determine that both of these go to my wall switch. And my wall switch only has two wires to it (one black and one white).

My questions are about hooking up a new light that has just one black, white, and ground.

1- Should the two wires (black and white 3 o'clock) that go to the light switch be connected together like I thought?

2-Where should my black wire and white wire from the new light go to? I hope I have explained this OK. Thank you.

k_buz 07-08-2012 12:40 AM

The loose white needs to be taped with black tape to signify it is actually a hot. Then put the remarked white to the two blacks already spliced together. The loose black goes to the black on the fixture and the currently spliced whites go to the white of the fixture.

hammerlane 07-08-2012 08:44 AM

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here is what KBuz says to do:

I did not show ground wires for ease of drawing, but al grounds get wire nitted together at teh light fixture and dont forget to attach ground wire to the switch

stickboy1375 07-08-2012 09:05 AM

Why is it that everyone feels the need to take apart splices when replacing a fixture? just remove the old fixture and reinstall the new fixture the same exact way.... sorry had to vent that. ;)

hammerlane 07-08-2012 09:08 AM

Quote:

Originally Posted by stickboy1375 (Post 960616)
Why is it that everyone feels the need to take apart splices when replacing a fixture? ;)


if people did as you say we would have nothing to do on a Sunday morning on an electrical forum.:laughing::laughing:

CopperClad 07-08-2012 09:09 AM

Maybe he had aluminum wire hooked to copper clad and replaced the aluminum wire with copper and then used a regular wire nut with noalox to make the new connection. :)

stickboy1375 07-08-2012 09:09 AM

Quote:

Originally Posted by hammerlane (Post 960618)
if people did as you say we would have nothing to do on a Sunday morning on an electrical forum.:laughing::laughing:

I honestly believe, this wiring diagram gets posted the most. :)

stickboy1375 07-08-2012 09:12 AM

Quote:

Originally Posted by CopperClad (Post 960619)
Maybe he had aluminum wire hooked to copper clad and replaced the aluminum wire with copper and then used a regular wire nut with noalox to make the new connection. :)

That's just silly and still a violation. ;)

hammerlane 07-08-2012 09:13 AM

Quote:

Originally Posted by stickboy1375 (Post 960620)
I honestly believe, this wiring diagram gets posted the most. :)

Because people get fixated on wire insulation color and not the actual purpose of the conductor. Ive said before, current does not care what color insulation is over the conductor.:thumbup:

Speedy Petey 07-08-2012 09:15 AM

Quote:

Originally Posted by stickboy1375 (Post 960625)
That's just silly and still a violation. ;)

And an even sillier explanation. :icon_rolleyes:

Speedy Petey 07-08-2012 09:16 AM

Quote:

Originally Posted by hammerlane (Post 960629)
Because people get fixated on wire insulation color and not the actual purpose of the conductor. Ive said before, current does not care what color insulation is over the conductor.:thumbup:

I totally agree with you guys. WHY take the splices apart??? I bet it worked before, didn't it?? Put it back the same way!! :thumbsup:

stickboy1375 07-08-2012 09:16 AM

Quote:

Originally Posted by hammerlane (Post 960629)
Because people get fixated on wire insulation color and not the actual purpose of the conductor. Ive said before, current does not care what color insulation is over the conductor.:thumbup:

I concur with that, I believe when they take the fixture down they see a white conductor spliced to a black conductor and try to 'fix' the non existing problem. :laughing:

CopperClad 07-08-2012 09:30 AM

I seriously beg to differ. If you took down a fixture or 2 and a few receptacles in my parents house?? You would seriously take apart every connection you found, restrip, repigtail, and then wonder to yourself how the house hadn't burned to the ground yet.. I could take some photos in the attic that would put your jaw to the ground. If I put my name on something I always check the previous installers work. :)

Speedy Petey 07-08-2012 09:38 AM

Quote:

Originally Posted by CopperClad (Post 960648)
I seriously beg to differ. If you took down a fixture or 2 and a few receptacles in my parents house?? You would seriously take apart every connection you found, restrip, repigtail, and then wonder to yourself how the house hadn't burned to the ground yet.. I could take some photos in the attic that would put your jaw to the ground. If I put my name on something I always check the previous installers work. :)

Then that is the exception rather than the rule. We see this ALL the time here and it is extremely rare that there was anything wrong to begin with.

Minus08 07-08-2012 09:43 AM

Quote:

Originally Posted by Speedy Petey (Post 960654)
it is extremely rare that there was anything wrong to begin with.

Look at the photo of the wires in post 1. They look in pretty good condition to me. Even hammers photo wires look good.:laughing:


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