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Old 03-27-2009, 09:20 AM   #1
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Adding a exhaust fan


I'm adding a exhaust fan to my master bedroom and I'm a little confused about the wiring. I plan on adding a duel switch to the current single switch that controls the vanity light. The top switch will control the vanity light, the bottom switch will control the exhaust fan.

My question is, can I just pig tail off the current wiring in the vanity switch box? What would you recommend?
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Old 03-27-2009, 10:13 AM   #2
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Adding a exhaust fan


This is how I would do it, but I'm no expert. Don't know why you are bringing the GFI outlet into the equation.

EDIT: updated image to reflect theatretch85's suggestions


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Last edited by surrogate; 03-28-2009 at 10:30 AM. Reason: updated image
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Old 03-27-2009, 10:23 AM   #3
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Adding a exhaust fan


Nice diagram. For the GFI I was just showing that it was existing and being fed from the switch.

I'm just worried about pig tailing to much. As you can see from my diagram there are already quite a few wires in the mix.
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Old 03-27-2009, 11:06 AM   #4
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Adding a exhaust fan


I updated the diagram to include the gcfi. Feed the switch from the gcfi instead of the other way around.
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Old 03-27-2009, 08:15 PM   #5
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Adding a exhaust fan


Bathroom lights and fans are NOT required by code to be GFCI protected unless specifically indicated as such by the manufacturer. Running power into both the switches and the GFCI outlet is just fine, you do not need to run them through the GFCI. Think about what happens in the event you do trip the GFCI; you'll be left in the dark in the bathroom with no lights.

Personally I would not put the lights and fan on the GFCI outlet.
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Old 03-27-2009, 09:03 PM   #6
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Adding a exhaust fan


From the ex fan cable, put the white with the whites under the wire nut.

Your stacked switch wil have one terminal for the power (existing pigtai; to light switch) and two separate terminals for the light and fan blacks.
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Old 03-29-2009, 08:40 AM   #7
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Adding a exhaust fan


Worked great. I attached the neutral to the existing wires (under the wire nut), put the red wire on the black screw, and put the blacks from the light and fan on the brass.

Thanks for the help.

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