Understanding Bathroom Exhaust Fan Switch Wiring

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
See more about Home Wiring for Michigan

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

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

The Deep Dark Secrets of  Bathroom Exhaust Fan Switch Wiring

• Bathroom electrical wiring secret number one – don’t tare everything apart without identifying the wires first.
• The wiring will need to be identified for the incoming and out going power, then the switch legs.
• 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.

The Following links will assist you with your electrical question:

Circuit Wiring

Electrical Panel Circuit Listing

Lighting For The Home

Lighting Electrical Codes

electrical circuit

Electric Circuit Listing
The size of the home electrical service panel is designed by calculating the square footage of the home and factoring in the code requirements for the electrical circuits that are required.

For more information about Bath Exhaust Fan
Bath Exhaust Fan

Bathroom Exhaust Fan

• Installing a bath exhaust fan
• Replacing your existing bathroom exhaust fan

This link is helpful as a Handyman
Do-It-Yourself Electrical