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Wiring for a Bathroom Exhaust Fan

The Basics of Installing Electrical Wiring for a Bathroom Exhaust Fan: Answers to all of your questions about installing a bath exhaust fan and your bathroom exhaust fan replacement project.


Wiring a Bathroom Exhaust Fan
Electrical Question: I am wiring a bath exhaust fan that also has a light.

Thanks!

This electrical question came from: Brian, a Homeowner from Goshen, KY.

Additional Comments: Great site. Very informative and easy to read. I am definitely adding it to my favorites. Thanks for the info.

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

Wiring for a Bathroom Exhaust Fan

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

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Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.


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Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.





Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

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FAQs Frequently Asked Questions and Comments

2 Responses to “Wiring for a Bathroom Exhaust Fan”
  1. Max "Generator" Stanford says:

    What kind of power do fans usually draw? It doesn’t seem like it would be that much. I was thinking about someone living in a rural area where the electrical system can be a bit touchy. If there was a natural problem or failure how much could a generator pick up comfortably? Would it be worth it to disconnect non-essentials like a fan?

    • Dave Rongey says:

      Hi Max,
      The electrical load of the fan would depend on the size of the fan as there are so many different types of fans and exhaust fans. This article is about bathroom exhaust fans which are relatively small, the motors is fractional HP, and require a low amount of power so they would not significantly affect the load of a generator.
      Hope this helps.
      Dave

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