Wiring Three Switches For A Bathroom Exhaust Fan, Light And Heater - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 12-06-2011, 04:48 PM   #1
Join Date: Dec 2011
Posts: 1
Rewards Points: 10

wiring three switches for a bathroom exhaust fan, light and heater

I want to wire a exhaust fan with heat and a light. Looking for some direction on how to wire switches for each function exhaust fan, light and heat?


jlgs35 is offline   Reply With Quote
Old 12-06-2011, 05:56 PM   #2
joed's Avatar
Join Date: Mar 2005
Location: Welland, Ontario
Posts: 11,062
Rewards Points: 8,916
Blog Entries: 11

Power to switch Then four wires + ground to unit. One wire is neutral. Each of the other three wires is power to fan, heater, light.
At switch connect power neutral to unit neutral.
Connect power to three pigtails. Connect one pigtail to each switch. Connect hot wires fro unit to each separate switch.


joed is offline   Reply With Quote
Old 12-06-2011, 08:04 PM   #3
Retired from the grind
gregzoll's Avatar
Join Date: Dec 2006
Location: Midwest - Central Illinois
Posts: 16,949
Rewards Points: 6,472

You are most likely going to need #12 for the heater, and that would most likely have to be on a separate circuit than the lights. Post the spec's on the unit, which is manufacturer & model #, and pictures of your current switch layout.
Ren: Now listen, Cadet. I've got a job for you. See this button? Ren: Don't touch it! It's the History Eraser button, you fool! Stimpy: So what'll happen? Ren: That's just it. We don't know. Maybe something bad, maybe something good. I guess we'll never know, 'cause you're going to guard it. You won't touch it, will you?
gregzoll is offline   Reply With Quote
Old 12-06-2011, 08:42 PM   #4
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,706
Rewards Points: 3,518

Optional refinement.

Use a 3 way switch for the heater with power connected to the common terminal.

The fan switch is fed from one of the heater switch terminals instead of the power feed. The other heater switch terminal is for the heater.

This way you must have the heater off in order to turn the fan on, thus avoiding wasting heat out the exhaust.

In any event you may need a heavier duty switch (amperes rating) for the heater.
Attached Thumbnails
wiring three switches for a bathroom exhaust fan, light and heater-lights2.jpg  
Tornado victims: Do not rush to rebuild. Take your time and look for and get a good contractor. Or consider selling the property and moving to a home that is ready to live in.
AllanJ is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Help How to Wire Bathroom "Fan Heater Light Night-light" unit, and questions Tryvidy Electrical 9 06-18-2012 02:37 PM
Bathroom switch for light exhuast heater finite15 Electrical 6 05-10-2011 08:00 PM
bathroom light with fan and heater abrite98 Electrical 10 11-02-2010 07:03 PM
Wiring for replacing a bathroom fan, heater, light and night light unit. tgallopbs Electrical 24 11-02-2010 09:57 AM
wiring a bathroom fan, light, heater combo on two switches zddingus Electrical 9 04-22-2010 07:48 PM

Top of Page | View New Posts