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How to Wire a Bath Exhaust Fan and Light

Installing and Wiring a Bath Exhaust Fan and Light: Power Sources for a Bath Exhaust Fan and Light, Power From a GFCI Outlet, Junction Box Wiring.


Home Electrical Wiring Video

How to Wire a GFCI Outlet
without a Ground Wire

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Installing and Wiring a Bath Exhaust Fan and Light
Electrical Question: After my bathroom addition was rough wired and before the insulation was done I decided to add a ceiling fan and light to be controlled with separate switches in place of a simple light fixture.

What can I do?

This home electrical repairs question came from: Mike, from Darke County , Ohio.

Dave’s Reply:
Thanks for your electrical troubleshooting question Mike.

Application: Wiring a Bath Exhaust Fan.
Skill Level: Intermediate to Advanced – Best performed by a Licensed Electrician.
Tools Required: Electricians Pouch of Hand Tools for Rough-In Wiring, Electric Drill and Auger Bits and Extension Cord.
Estimated Time: Depends on the extent of the bathroom remodel project, the type of construction and available access to the project area.
Precaution: Any existing wiring in the immediate area that may interfere with the installation of new construction materials should be identified, turned OFF and Tagged.
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.

Wiring a Bath Exhaust Fan and Light

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Home electrical wiring includes 110 volt outlets and 220 volt outlets and receptacles which are common place in every home. See how wiring electrical outlets for the home are done.

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This article looks at common 120 volt and 240 volt house wiring circuits and the circuit breakers that are installed identifying the types and amperage sizes used in most homes.

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This list of articles will help you learn about the features and benefits provided by GFI and GFCI Receptacles and how they are wired.

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Dave's Guide to Home Electrical Wiring:

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Here's How to Do It:
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, Handy Women, 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
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NEC Codes for Home Electrical Wiring
....and much more.


Learn more about Home Electrical Wiring
with my Online Video Course:
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Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

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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

4 Responses to “How to Wire a Bath Exhaust Fan and Light”
  1. Vincent Key says:

    I am trying to wire a bathroom. I have power, light, and switch wires coming into the junction box with power going to the switch connected to the vent fan switch and GFCI outlet, and a connection going to another outlet. I have power to light also to vent fan, but not to the GFCI. What could be the problem? When I remove the GFCI and wire the wires together I have a completed circuit.

  2. Dave Rongey says:

    Hi Vincent,
    Circuit Wiring for a Bathroom
    Check the wiring to the GFCI outlet, specifically wiring to the LINE and LOAD terminals. If the wiring is backwards the the GFCI will not have power at the outlet.
    Identify all of the wiring, both hots and neutrals. Create a diagram if needed, but understand that the wiring connections of the GFCI must be correct.
    I hope this helps,
    Dave

  3. Gary says:

    Wiring a Broan QT140 LE Exhaust Fan

    I have a Broan QT140 LE that I want to put above a shower. It says I need to have it on a GFCI circuit since it will be in a shower. Can I bring the load (power) into the dual wall box and into the load side of GFCI OUTLET and than out (line out in GFCI) to the switch for the fan/light?

  4. Dave Rongey says:

    GFCI Protection for a Bath Exhaust Fax

    Hi Gary,
    To provide GFCI protection for an exhaust fan the incoming circuit power connects to the Line side of the GFCI outlet, then the wires for the exhaust fan connect to the Load side of the GFCI outlet. The switches for the exhaust fan and light are installed on the Load side wiring as well.
    Dave