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#93585 06/01/05 09:44 PM
Joined: Jan 2004
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Can I run a multiwire branch circuit to a garage consisting of a #14 and a #12 ungrounded conductor and a # 12 grounded conductor?


George Little
2017 / 2014 NEC & Related Books and Study Guides
#93586 06/02/05 12:01 AM
Joined: Feb 2003
Posts: 687
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Sometimes multi wire circuits are run in mixed wire/breaker sizes around here. One example would be a bathroom. The #14 for lighting and #12 for GFI. Myself I try to keep equipment off of lighting. I'm sure some would not like this multi wire set-up. Maybe someone could figure the math on this with extreme conditions. I doubt it would make much differance doing it this way. Never had a complaint or seen a problem. I try to tape the network together and put the breakers next to each other to avoid confusion for someone elce but thats just my thing.

Tom

#93587 06/02/05 12:37 AM
Joined: Mar 2005
Posts: 212
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Member
Active, are you talking about NM? Where does one get such stuff?

#93588 06/02/05 12:39 AM
Joined: May 2003
Posts: 2,876
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e57 Offline
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Don't see why not... At least if neutral is not the #14.

Is this a seperate building?


Mark Heller
"Well - I oughta....." -Jackie Gleason
#93589 06/02/05 02:00 AM
Joined: Feb 2003
Posts: 687
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Not NM. I'm allways talking pipe. Don't see much MN except code corections or some use it for UF. If I had to do a whole building with MN I would look like a Moe because not much experiance with it.

Tom

#93590 06/02/05 05:48 AM
Joined: Jan 2003
Posts: 4,391
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Moderator
I have run a mixed size multiwire circuit before. I see no problem with it.

We remodeled a small kitchen in a office building. They had a removed a stove fed with 6/3 AC cable.

I used one side of the 6/3 to feed a 30 amp 120 volt water heater and the other side to feed 120 volt 20 amp outlets.

No worries about voltage drop. [Linked Image]


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#93591 06/02/05 10:12 PM
Joined: Jan 2002
Posts: 1,457
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Member
You certainly can do this. Wait. Is this a trick question? Define garage. [Linked Image]

[This message has been edited by Electricmanscott (edited 06-02-2005).]

#93592 06/02/05 10:43 PM
Joined: Jan 2004
Posts: 1,507
G
Member
No trick question. Just never did that trick before. Can't see any hazard and the reason he wanted to do it was so he can put the plugs on a 20a. circuit and the lights on a 15a. circuit. I couldn't find anything in the code that prohibited it. Thought you code aficionados knew of an article in the book that would apply. As for the definition of garage:

GARAGE
n 1: an outbuilding (or part of a building) for housing automobiles 2: a repair shop where cars and trucks are serviced and repaired [syn: service department] v : keep or store in a garage; "we don't garage our car"

Source: WordNet ® 2.0, © 2003 Princeton University




[This message has been edited by George Little (edited 06-02-2005).]


George Little
#93593 06/02/05 10:47 PM
Joined: Dec 2004
Posts: 209
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Member
George,
Can we assume that this is an "attached" garage?

#93594 06/02/05 10:49 PM
Joined: Jan 2004
Posts: 1,507
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Member
Detached Garage - I forgot to mention that.


George Little
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