I'm considering installing an exhaust fan in my bathroom which includes light and heat, and requires a dedicated 20 amp circuit. Would this circuit need GFCI protection? The instructions for the unit don't say anything about it. Even if it's not required, would it be a good idea to do anyway?
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3 Answers
The National Electrical Code (NEC) does not require bathroom exhaust fans to be GFCI protected, however, there is this bit in Article 110.
110.3 Examination, Identification, Installation, and Use of Equipment.
(B) Installation and Use. Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.
Which means you have to follow all of the manufacturers instructions while installing the fan. If you read the installation instructions that came with the fan, you might find something like this.
SUITABLE FOR USE OVER TUB OR SHOWER ENCLOSURE WHEN INSTALLED IN A GFCI PROTECTED BRANCH CIRCUIT.
Source
If you install this fan over a tub or shower, the fan must be GFCI protected according to the manufacturer.
answered Oct 15, 2012 at 14:08
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If he has to install it on a dedicated 20 amp circuit then wouldn't running it ahead of a GFI outlet allow for the possibility that one could also plug in other devices to the outlet, like a hair dryer? In this case it is no longer dedicated. Commented Oct 15, 2012 at 15:49
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@maple_shaft Huh? If it's a dedicated circuit, the GFCI protection would be at the load center. Where would they be plugging in the hair dryer? Commented Oct 15, 2012 at 19:03
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Breaker -> line -> GFI outlet -> load -> switch -> fanIf I plug a hair dryer into that GFI outlet then then the fan is not on a dedicated circuit anymore... or perhaps my understanding of the term dedicated is completely incorrect? Commented Oct 15, 2012 at 19:31 -
@maple_shaft there's no outlet on a dedicated circuit. The diagram is
GFCI breaker -> switch -> fan– BMitchCommented Oct 15, 2012 at 19:33 -
@BMitch Ahhh! I get it. Never seen JUST a GFCI breaker before, thought they only come in outlet form. Thanks Commented Oct 15, 2012 at 19:35
needing would depend on your local codes and whether the device has a build-in GFCI breaker
though if the fan needs a ground you probably should add one
however it can't hurt adding one given that a GCFI breaker doesn't cost much
answered Oct 15, 2012 at 7:42
No. GFCI protection is only needed for outlets.
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3Your answer is incorrect. There are certainly circumstances in which devices require GFCI protection.– MatthewCommented Oct 15, 2012 at 16:26