Wiring for bathroom fan?

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Old 02-17-12, 06:47 PM
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Wiring for bathroom fan?

I'm back for more punishment.
I need to install a new bathroom fan - it's got a light, night light, and a fan with two settings (auto, manual). It's connected to a triple switch where one switch has three settings, so I need to run 4 hot wires from the switch to the fan, plus neutral and ground. I asked around at HD but they didn't have any 14/5 NM-B

So what's the right way to wire this? Run two 14/3 NM-B cables and wire the neutral and ground together on both ends?
 
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Old 02-17-12, 07:02 PM
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Easiest is to use ENT flexible conduit and THHN wires.
 
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Old 02-17-12, 07:16 PM
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Thanks Ray - will have to read up on that one, sounds good though.
Is the double 14/3 idea not allowed by code, or just not as easy?
 
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Old 02-17-12, 07:24 PM
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Is the double 14/3 idea not allowed by code, or just not as easy?
It would work but the connection box on the fan usually doesn't give you much room for wires. The ENT would be fewer wires in a small space.
 

Last edited by ray2047; 02-17-12 at 08:16 PM.
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Old 02-17-12, 07:44 PM
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Makes sense, was thinking about the space issue too. Thanks!
 
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Old 02-18-12, 06:42 AM
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I was curious what brand and model number fan you bought.
 
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Old 03-06-12, 07:14 PM
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CasualJoe - I got a Nutone humidity sensing fan. It worked out great, the humidity sensing feature turns it on automatically when you get in the shower. It moves a LOT of air, much better than the old fan. Model is QTXN110SL. The only (minor) downside is that to really make the fan work well you need a somewhat unusual three position switch for off/auto/on.
 
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Old 03-07-12, 05:25 PM
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Looking at the wiring diagrams in the installation instructions I see the 3 function control can be wired with a 14-2 and a 14-3 cable. The 4 function control can be wired with two 14-3 cables.

http://www.nutone.com/PDF/InstallGui..._99043589E.pdf
 
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