How to wire 3 switches to 1 fan ?

1370 Views 4 Replies 3 Participants Last post by Yoyizit, Jul 16, 2009

yddkdd

Discussion Starter · Jul 16, 2009

I have a whole house exhaust for my bathroom. I will be adding on to my home & putting in another shower and WC. I want to figure out how to have this fan turn on if ANY (and ALL) of the 3 switches are on, and therefore only turn off if ALL of the switches are in the OFF position. How can I do this ?

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joed

· #2 · Jul 16, 2009

Wire all the switches in parallel. That way if any switch is on the fan will be on. ONLY if ALL the switches are off will the fan be off.

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yddkdd

Discussion Starter · #3 · Jul 16, 2009

Thanks. I've never tried that before. I found a nice explanation here. Thanks again!

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Yoyizit

· #4 · Jul 16, 2009 (Edited)

xxxxxxx

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Yoyizit

· #5 · Jul 16, 2009 (Edited)

yddkdd said:
to have this fan turn on if ANY (and ALL) of the 3 switches are on, and therefore only turn off if ALL of the switches are in the OFF position.

It's an OR function, implemented as posted above.
". . .a logical operator that results in true whenever one or more of its operands are true."

The "and ALL" can be an AND function.

If you want control from all switches you need 2 ea. 3-way switches and a 4-way.

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