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Old 04-11-2013, 03:12 PM   #1
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How to connect bath fan to existing light?


I want bathroom exhaust fan to tap into existing light wiring so they both turn on together.

switch >> light >> fan


I haven't been up in the attic, but I think the wiring goes over, then down behind the wall to reach the wall light.

How do I tap into this wire? Do I have to cut it somewhere and then add pigtails?

More importantly, will this affect the voltage of the light and fan, and cause dimming or lower fan speed?


(not my bathroom....)

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Old 04-11-2013, 03:49 PM   #2
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Depending on how the power reaches the switch.
Remove the light fixture and connect the fan wires the same way the light fixture is wired.

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Old 04-11-2013, 07:33 PM   #3
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I'm looking at a bath fan that has its own light.
The instructions assume you have a fancy multicontrol switch, which I won't have, since I'm connecting the fan to the vanity light.

it has a separate wire for the light and fan, and I'm going to disable the night light feature.

I can twist the blue and black fan wires together and pigtail them off the single incoming black wire so they operate together.... same idea right?

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