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Old 06-10-2010, 02:07 PM   #1
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Light Wiring Question


I've got no problem wiring new rooms off lighting circuits that are fed at the switch but was wondering if someone could take the time to explain to me how to do it if the light was where the feed is at. I did a quick drawing to explain if you can't understand what im talking about. I understand boxfill and all the other code that comes with it i'm just looking to know the connections. Thanks for the time.
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Old 06-10-2010, 02:56 PM   #2
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__________________________________________
At the fixture box:
Wire 1 comes into fixture box as the power source
Wire 2 goes from fixture box to switch box

Wire 1 black is connected to wire 2 white, and wire 2 white should be painted or taped to be black
Wire 1 white is connected to fixture white
Wire 2 black is connected to the fixture black

__________________________________________
At the switch box:
Wire 1 comes into switch box from fixture box

Wire 1 white (which is hot coming from the fixture box) is connected to switch and painted/taped black
Wire 2 black is connected to switch
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Old 06-10-2010, 04:02 PM   #3
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If you understand the theory, you just run a regular white/black wire to the light switch interrupting the flow of the incoming powers black at the light so it has no way to go to the light without going through the switch first. White goes on one screw of the switch, black goes on the other. This is one of the common situations a white & black wire are both used as blacks, and is recommended you tape/mark the white wire. Most will know when they see a white connected to a black in in the gang of the light what's going on, or see a white wire attached to a light switch but if there's other things in the gang it will help to distinguish it. This is repeating what Troglodyte said, just in a little more English

Last edited by Piedmont; 06-10-2010 at 04:08 PM.
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Old 06-10-2010, 05:27 PM   #4
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Thanks Piedmont, I'm kind of a programmer by trade so I tend to write like that.
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Old 06-10-2010, 11:26 PM   #5
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This is repeating troglodyte and piedmont in diagram form ....
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Old 06-11-2010, 06:53 AM   #6
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Your diagram looks like crop circles.

Are you asking how to wire a switch for a light that is fed at the light, or how to wire outlets in the room from power that is fed to the light?

For wiring outlets, you are going to have to cut some drywall unless you can access from above (ie attic). Unless a previous person was nice and put 14-3 going to the switch box, you are going to have to make a run back to the light.
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