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Wiring Bathroom Exhaust Fan Switches


By Dave Rongey - Summary:

How to Wire a Bathroom Exhaust Fan Switch and the Electrical Wiring Connections: I have to replace a bathroom ceiling exhaust fan with two switches for the fan and light, and a third leg continuing on to light the vanity.


Bathroom Exhaust Fan Switch Wiring

Electrical Question: I have to replace a bathroom ceiling exhaust fan with two switches  for the fan and light, and a third leg continuing on to light the vanity.

  • I wasn’t paying close attention when I was taking the old one out.
  • Now am not sure how to put it back together.
  • In the picture the switches come in on the left, the other circuit continues out on the right.

Thanks! JP.

This electrical question came from: JP, a Handyman from Traverse City, MI.

Additional Comments: Great website! Deep content, good links, easy to navigate.
Thanks!

Dave’s Reply:
Thanks for your electrical question JP.

Preparations for Wiring a  Bathroom Exhaust Fan Switch

  • Application: Wiring a Bathroom Exhaust Fan Switch.
  • Skill Level: Intermediate to Advanced, best installed by a licensed electrical contractor.
  • Tools Required: Basic Electricians Pouch Hand Tools and a Voltage Tester.
  • Estimated Time: Depends on personal level experience, ability to work with tools and the access to the wall switch for the exhaust fan and if a larger switch box will be required.
  • Precaution: The bathroom exhaust fan circuit should be identified, turned OFF and Tagged with a Note before working with the wiring and installing the exhaust fan switch.
  • Notice: Modifying existing wiring or installing additional bathroom electrical wiring should be done according to local and national electrical codes with a permit and be inspected.

How to Wire a  Bathroom Exhaust Fan Switch

  • Bathroom Electrical Wiring Secret Number One:
    • Don’t take all the electrical wiring all apart without identifying all the wires first.
  • The wiring will need to be identified for the following:
    • Incoming Power.
    • Outgoing Power.
    • Switched wires to the exhaust fan.
  • Once these are identified then the electrical wiring connections and switch wiring will be very straight forward.
  • Hook it all back up, take a warm shower and enjoy your exhaust fan.

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Wiring 3-Wire and 4-Wire Electric Range
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Electrical Codes for Home Electrical Wiring
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One Response to “Wiring Bathroom Exhaust Fan Switches”
  1. Janice says:

    I have a exhaust fan in my bathroom,I don’t use it ,so I want to install a small ceiling fan. Can I disconnect wiring to exhaust fan and use this wiring on the ceiling fan ,so I can use the same wall switch?


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