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Old 01-14-2011, 12:57 PM   #16
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How to gfi protect bathroom fan?


So I had some more thoughts as I have been reading the NEC.

My understanding is that the bathroom receptacles shall be a 20 amp home run, and all outlets be GFI protected and that I cannot power additional devices off this circuit.

In this case I cannot power my bathroom fan and later use this same 20 amp line for additional receptacles.

So it seems to me that if I run a 20 amp line to my bathroom and use it for my fan, I cannot later use this line in future remodels for adding outlets to the outer part of the bathroom.

My question is: Lets say I add a blank face gfi on to my existing 15 amp circuit to protect my bathroom fan. Is this blank face GFCI considered a receptacle by the NEC and thus need to be on a dedicated circuit? If so how can I power my bathroom fan off it. It seems as though the code is saying I should power my bathroom fan off the existing 15 amp circuits, and run a 2nd 20 amp circuit just for the outlets?


Hopefully my question makes sense?

Thanks
brian

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Old 01-14-2011, 02:05 PM   #17
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How to gfi protect bathroom fan?


The blank face is not considered a receptacle.
I think you may have interpet the nec wrong.
You can use the dedicated 20 amp circuit to power everything, lights, fans, other receptacles in that bathroom as long as you do not leave that bathroom.
Of course we are not talking about installing a jacuzzi tub are we?
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Old 01-14-2011, 08:02 PM   #18
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How to gfi protect bathroom fan?


Hi guys, Thanks Jbfan that was the same thing the guy at the city office told me about not counting as a receptacle.

I must have read the code wrong.

After talking with the department of planning my plan is that I will power the bathroom fan and light off of the existing 15 amp circuit after passing it through a blank face gfci.

Thanks for all the help guys

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Old 01-14-2011, 09:53 PM   #19
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How to gfi protect bathroom fan?


I actually had a slight modification to my plan. I am going to put the fan up there, but am going to not put a fan/light combo in. IE there is going to be a dedicated fan unit, and then a recessed light can rated for use in shower.

So my new question:
I was intending to run a single 14/3 up from my switch box to the attic. Originally with a fan/light combo, this was going to work well. Now that I am using separate light and fan, can I still run a 14/3 up? I know I can't split out conductors, so how would I go from one 14/3 piece of romex to 2 separate locations? I was thinking I could run all of the conductors in the 14/3 into the jbox on the light can, and then continue to the next fixture? But this seems like shoving a lot of wires into a small recessed light junction box.

Should I just run two 14/2 up? Or can I still do this with the 14/3? I may end up putting in a second light can on the same light circuit over the toilet as well.

Thanks
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Old 01-14-2011, 09:58 PM   #20
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How to gfi protect bathroom fan?


Either way.
A can light has room for the wire if you want to go with a 14/3 to the can, then a 14/2 fron the can to the fan.
The fan has a much smaller j-box and will not allow you to go the other way.

If the attic is accessible, then you can go to a seperate j-box, and split out from there.

I just read the part about a second light.
In that case go with 2 14/2 from the switch box.
Just make sure that the cu rating of the box is large enough for the number of wires.
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Old 01-14-2011, 10:35 PM   #21
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How to gfi protect bathroom fan?


My 3 gang box has a 44 cuin capacity. By my calculations I have
2 switch = 4 conductors
1 gfci = 2 conductors
8 wires = 8 conductor
grounds = 1 conductor

which gives me 15, 14 awg conductors so I need to have 30 cu in?

Correct?

Edit: forgot to say thanks

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