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Electrical Wire and Cable

How to Install a Time Switch for an Exhaust Fan

Installing a Bathroom Exhaust Fan Control Switch or Occupancy Sensor: Selecting and Wiring a Auto On or Auto Off Exhaust Fan Switch.

Wiring a Bathroom Exhaust Fan Time Switch or Occupancy Sensor
Electrical Question: I have a small bathroom with a ceiling fixture that includes a light, a heat lamp with circulating fan and an exhaust fan. These are individually controlled by toggle switches in a 3 gang box. The exhaust fan is a small squirrel cage type that plugs into an outlet in the box. No other info available on it but I suspect it’s rated at about 50 to 80 CFM.

This electrical wiring question came from Steve, in Steamboat Springs, Colorado.

Dave’s Reply:
Thanks for your electric wiring question Steve.

Preparations for Wiring a Control Switch for a Bathroom Exhaust Fan

Example of a Combination Bathroom Exhaust Fan
bath exhaust fan

Selecting an Auto On or Auto Off Exhaust Fan Switch

Installing a Bathroom Exhaust Fan Control Switch or Occupancy Sensor

The wiring of  the bathroom exhaust fan switch will depend on the exact switch that is selected, however below is a description of the most common control switches and how they are wired.

Example of a Digital Time Switch
digital timer switch

More about Wiring Exhaust Fans

How to Wire a Bath Exhaust Fan
Bath Exhaust Fan

Bathroom Exhaust Fan

Answers to all of your questions about installing a bath exhaust fan and your bathroom exhaust fan replacement project.

How to Wire a Switch

Wiring a Light Switch

Wiring Diagrams
Fully Explained Light Switch Wiring Diagrams. Detailed Electrical Wiring Diagrams and Pictures assist your Home Electrical Projects.

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Wiring GFCI Outlets
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NEC Codes for Home Electrical Wiring
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