stumped!!!!!!!!

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It seems like all this could be cleared up with an occupancy sensor in each bathroom. Then you know the fan will always come on when either bathroom is occupied with the bonus of making sure it's always shut off too.
 
Cow said:
It seems like all this could be cleared up with an occupancy sensor in each bathroom. Then you know the fan will always come on when either bathroom is occupied with the bonus of making sure it's always shut off too.
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Then there's the question of why not the lights, too, then whether both bathroom lights should work together, or do you have to find 2-pole sensors, or add a pair of relays, or . . .

See what problems you caused?! :mad: :)D)
 
LarryFine said:
This is a problem unless the switches are rated for more than one circuit:
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Why would a two pole switch not be rated for two circuits? Seems pretty useless to me. The only application I could think of would be switching hot and neutral simultaneously (or oddball design issues such as the OP), otherwise generally you use a two pole switch for switching two circuits.
 
EBFD6 said:
Why would a two pole switch not be rated for two circuits? Seems pretty useless to me. The only application I could think of would be switching hot and neutral simultaneously (or oddball design issues such as the OP), otherwise generally you use a two pole switch for switching two circuits.
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I don't disagree, but check the marking/labeling on one the next chance you get.
 
480sparky said:
Can't be done with SP switches.

Are the lights & fan on the same circuit?

bathfans.jpg






Otherwise,

bathfans2.jpg
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This is the correct way of doing it, unless the fan is three phase, then the switches would drive a starter. I have seen this setup on many enginered prints, this is pretty much the standard.
 
fan always on

fan always on

I have heard the mechanical rule also. Wondering if thats a local building code or what?
 
EBFD6 said:
Why would a two pole switch not be rated for two circuits? Seems pretty useless to me. The only application I could think of would be switching hot and neutral simultaneously (or oddball design issues such as the OP), otherwise generally you use a two pole switch for switching two circuits.
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LarryFine said:
I don't disagree, but check the marking/labeling on one the next chance you get.
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two ungrounded conductors does not always mean two circuits.:)
Branch Circuit, Multiwire. A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.
 
acrwc10 said:
two ungrounded conductors does not always mean two circuits.:)
Branch Circuit, Multiwire. A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.
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So I'm not installing a multiwire, I'm installing a single circuit:

210.4 Multiwire Branch Circuits.
(A) General. Branch circuits recognized by this article shall be permitted as multiwire circuits. A multiwire circuit shall be permitted to be considered as multiple circuits. All conductors of a multiwire branch circuit shall originate from the same panelboard or similar distribution equipment.


I'm allowed to consider it multiple circuits, but I'm not required to. Ergo, it's one circuit.
 
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