connecting 3 wires to 4 wires box


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Old 11-21-07, 08:59 AM
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connecting 3 wires to 4 wires box

I am new with electrical work. I purchased a light rail kit that comes with a transformer with 3 wires : green ,white and black.
The electrical box on the ceiling has 4 wires : black ,red, white and copper.
I suspect the electrical box on the ceiling is also made to install a fan.

Which wires do I connect to? What do I need to do with the fourth and remaining wire?
 
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Old 11-21-07, 09:43 AM
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You can't know for sure without looking at the wiring at the switch. Black is probably for the light switch and red is probably for the fan switch, but you need to examine the switch wiring to know for sure. It's never a good idea to guess.
 
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Old 11-21-07, 09:46 AM
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Is there A light switch involved with this box?( Typically there will be)

A two wire tester is in order. you need to find the wire that is live with the light switch turned on. Best guess is it will be the red or black, but check anyway.

Is there anything in mounted to the box now? If so how is it wired.

Once you find the correct live wire, Put a wire nut on the extra wire and fold it up into the box.
 
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Old 11-21-07, 09:56 AM
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Is there one wall switch or two?
 
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Old 11-21-07, 10:07 AM
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I see two wall switchs. Currently there is nothing on the ceiling (only a white cover) therefore I cannot copy the existing scheme.
 
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Old 11-21-07, 10:36 AM
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Do the two switches have on/off or are they blank.
 
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Old 11-21-07, 10:45 AM
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The 2 switches have on and off. The wires on the ceiling have the following colors : red, black, white and copper.
 
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Old 11-21-07, 12:09 PM
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Fixture black to both ceiling black and ceiling red.
White to white.
Green to copper.

This way, either of your switches will operate the new lights (i.e., the lights will be on if either or both switch is on, and will only be off if both switches are off). If you'd prefer that just one switch operate the new lights and the other do nothing, then cap off either the ceiling black or the ceiling red (which one you cap will determine which switch works).
 
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Old 11-27-07, 09:12 AM
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Thank you John! It worked well after some time! Appreciate the advise
 
 

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