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Electrical Wire and Cable

Wiring a Bathroom Exhaust Fan and Switch

Do I need a neutral wire between switch boxes for the circuit wiring? How to Install a Bathroom Exhaust Fan and Electrical Wiring for Switches.

Bathroom Exhaust Fan and Switch
Electrical Question: Do I need a neutral wire between switch boxes for the circuit wiring?

Thank You very much in advance. Jayme.

This electrical wiring question came from: Jayme, a Homeowner in Canada.

Additional Comments: Great idea and very useful and much appreciated tool for homeowners.

Dave’s Reply:
Thanks for your electrical wiring question Jayme.

Wiring a Bathroom Exhaust Fan and Switches

Application: Bathroom Exhaust Fan and Switches.
Skill Level: Intermediate to Advanced – this is Best performed by a Licensed Electrical Contractor or Certified Electrician.
Tools Required: Basic Electricians Pouch Hand Tools, sheet rock tools, a non-conductive ladder and a Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and the access to the attic and area of the exhaust fan.
Precaution: Identify the circuit that will be used to power the bath exhaust fan, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Installing additional electrical wiring should be done with a permit and the work inspected.

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Wire It Right with the help of my Illustrated Wiring Book

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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
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Be Careful and Be Safe - Never Work on Energized Circuits!
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FAQs Frequently Asked Questions and Comments

3 Responses to “Wiring a Bathroom Exhaust Fan and Switch”
  1. Tina says:

    Can I Replace a Light with a Motion Sensor?
    I have 2 different switches for the bathroom light and fan. I want to keep the fan and replace the light switch with a motion sensor light switch. The wires are in the same box. There is a black wire, red one, white one and the ground that is in the box. The light switch has a black wire hooked to it and the black wire that goes to the fan and the light. The fan switch has the ground wire, the red one and the white one hook to it. Can I replace the light with a motion sensor light switch?

    • Dave Rongey says:

      Motion Detector Occupancy Sensor for a Bathroom Light
      Hi Tina,
      The bathroom light switch can be replaced with a motion detector, motion sensor, or occupancy sensor switch as you have described. All of these switches are very similar and are a great energy saving device. In fact, you may consider installing an occupancy sensor for the exhaust fan as well, only configure the length of time the exhaust fan will stay on longer to allow steam and odors to ventilate out of the bathroom.
      Interesting Note: In many states occupancy sensors are now required in bathrooms by the NEC code.
      I hope this helps you,

  2. Ed Anderson says:

    I would like to know there to find a limit switch for a bathroom exhaust fan. It is a Fasco model R359

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