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#187759 - 07/08/09 06:46 PM Electric Hand Dryers
GA76JW Offline
Member

Registered: 03/20/04
Posts: 195
Loc: Suwanee, GA USA
Can anyone point me in the right direction with the 2008 code? We are installing Hand dryers in the bathrooms at work and I can't seem to find anything in the code pertaining to this specifically.

Is there anything in there I should be aware of?

Thanks for the help.
_________________________
"If common sense was common, everyone would have it"-not sure, someone here


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#187761 - 07/08/09 07:20 PM Re: Electric Hand Dryers [Re: GA76JW]
renosteinke Offline
Cat Servant
Member

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
That's an interesting issue.

Most of those dryers are 240v .... which begs the question: to GFI or not?

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#187762 - 07/08/09 07:28 PM Re: Electric Hand Dryers [Re: renosteinke]
GA76JW Offline
Member

Registered: 03/20/04
Posts: 195
Loc: Suwanee, GA USA
My main question comes with the branch circuit aspect of it. My foreman has told us to drop a 12/2 MC cable down to it and this just doesn't feel right, but I still don't see anything relating to it in the code. I've been scanning and looking for the past 1/2 hour or so.


To GFI or not is a good question too. As well as distance from the edge of a sink maybe?


Edited by GA76JW (07/08/09 07:29 PM)
_________________________
"If common sense was common, everyone would have it"-not sure, someone here


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#187766 - 07/08/09 08:17 PM Re: Electric Hand Dryers [Re: GA76JW]
renosteinke Offline
Cat Servant
Member

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
12/2 simply isn't enough. Look at the nameplate; I think you'll find you need at least #10, and you'll want to have that red wire as well as a neutral. After all, some of the new ones have motion sensors, etc in them - so they might need that neutral.

I don't think the NEC specifically addresses the issue; the usual ampacity rules apply.

Since you're using MC, you really want to get it right the first time.

ALSO .. pay special attention to mounting height. Some folks place them so thay can do double duty as hair dryers.

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#187768 - 07/08/09 09:19 PM Re: Electric Hand Dryers [Re: renosteinke]
EV607797 Offline
Member

Registered: 10/25/06
Posts: 756
Loc: Fredericksburg, VA, USA
I've never encountered these dryers with heat that didn't have a 20A rating on the name plate, but then the only ones that I've worked with have been 120 volts. That being said, a 30 amp circuit would be required using #10.

The "turbo jet" ones that just use high-velocity air are different and a 20 amp circuit will suffice.

GFCI protection? Not that I can tell.
_________________________
---Ed---

"But the guy at Home Depot said it would work."

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#187772 - 07/09/09 08:34 AM Re: Electric Hand Dryers [Re: EV607797]
sabrown Offline
Member

Registered: 12/12/02
Posts: 297
Loc: Ogden, Utah, USA
I have not come across any that were beyond 20 amp. I also specify a permanent breaker lock to keep the area clean.

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#187782 - 07/09/09 04:04 PM Re: Electric Hand Dryers [Re: sabrown]
GA76JW Offline
Member

Registered: 03/20/04
Posts: 195
Loc: Suwanee, GA USA
well right now we are just roughing in the area, so we don't have the actual equipment to reference with. This is the first time I have roughed in a bathroom with hand dryers.


I do want to ask why you think we might need the 10-3 wire though?
_________________________
"If common sense was common, everyone would have it"-not sure, someone here


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#187783 - 07/09/09 04:18 PM Re: Electric Hand Dryers [Re: GA76JW]
maintenanceguy Offline
Member

Registered: 12/02/01
Posts: 303
Loc: Southern NJ, USA
I've installed or worked on lots of these. I've never seen one that had GFCI protecton nor installed one that way. I can't think of any rule that would require that unless there's a local ordinance. I'm assuming these will be hardwired and not plug connected.

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#187784 - 07/09/09 04:43 PM Re: Electric Hand Dryers [Re: maintenanceguy]
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
I went through my wife's catalogs from her shopping expedition into this area and the dryers seem to range from 1500 to 2300 watts for the conventional ones and 1100 watts for the new "high velocity" green dryers.
If you are going to have 240v dryers I see no reason why 14-2 would not work but 12-2 is the safe bet.
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#187785 - 07/09/09 04:47 PM Re: Electric Hand Dryers [Re: gfretwell]
HotLine1 Offline

Member

Registered: 04/03/02
Posts: 6804
Loc: Brick, NJ USA
GA:
A quick heads up on this....
Is your facility subject to ADA (American Disability Act) commonly called 'handicapped'. If it is, watch the mounting heights.
_________________________
John

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