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Conduit required in a garage.

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Conduit required in a garage. ejluhn720 via HomeKB.com 05-05-2008
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Posted by ejluhn720 via HomeKB.com on May 5, 2008, 9:47 pm
Is conduit required for wiring in a detached garage, or can the wire be run
to the outlet boxes in NM cable? I have exposed 2x4's with no drywall. Can
someone site a code reference? I am planning to add some additional wiring
to my garage and would like to do it correctly. I had seen something in an
old post about protecting wiring below 75".

Anybody help me out?

Ed

--
Message posted via http://www.homekb.com


Posted by Doug Miller on May 5, 2008, 9:56 pm
>Is conduit required for wiring in a detached garage, or can the wire be run
>to the outlet boxes in NM cable? I have exposed 2x4's with no drywall. Can
>someone site a code reference? I am planning to add some additional wiring
>to my garage and would like to do it correctly. I had seen something in an
>old post about protecting wiring below 75".

National Electrical Code, Article 334. NM is fine in a detached garage. When
running it perpendicular to the studs, drill holes in the studs and feed the
cable through the holes. When running parallel to the studs, staple it to the
face of the studs (the wide side), not the edge. No need to put it in conduit.

Posted by RBM on May 5, 2008, 10:04 pm

> Is conduit required for wiring in a detached garage, or can the wire be
> run
> to the outlet boxes in NM cable? I have exposed 2x4's with no drywall.
> Can
> someone site a code reference? I am planning to add some additional
> wiring
> to my garage and would like to do it correctly. I had seen something in
> an
> old post about protecting wiring below 75".
>
> Anybody help me out?
>
> Ed
>
> --
> Message posted via http://www.homekb.com
>


The NEC allows NM cable to be stapled on the sides of the 2x4's and drilled
through their centers. If you had drywall up and wanted to run NM on the
surface, you would protect it by sleeving it in PVC or EMT, etc.



Posted by on May 5, 2008, 11:54 pm
On Tue, 06 May 2008 01:47:32 GMT, "ejluhn720 via HomeKB.com"

>Is conduit required for wiring in a detached garage, or can the wire be run
>to the outlet boxes in NM cable? I have exposed 2x4's with no drywall. Can
>someone site a code reference? I am planning to add some additional wiring
>to my garage and would like to do it correctly. I had seen something in an
>old post about protecting wiring below 75".
>
>Anybody help me out?
>
>Ed

Just be sure you drill your holes and locate the romex 1 1/4" back
from the front of the 2x4 so it won't get hit by a drywall screw. That
pretty much means drill or staple right down the center of the 2x4.
If this is closer you need metal conduit or protective metal plates.

Posted by John Grabowski on May 6, 2008, 9:28 am

> Is conduit required for wiring in a detached garage, or can the wire be
> run
> to the outlet boxes in NM cable? I have exposed 2x4's with no drywall.
> Can
> someone site a code reference? I am planning to add some additional
> wiring
> to my garage and would like to do it correctly. I had seen something in
> an
> old post about protecting wiring below 75".
>
> Anybody help me out?
>
> Ed


I heard of anther electrical contractor failing inspection for this and on a
recent detached garage that I did my brother (An inspector) warned me about
using exposed Romex. Fortunately in my case the walls were going to be
drywalled. I am in New Jersey.

Article 334.10(1) specifies it is acceptable within dwelling units. A
detached garage is not a dwelling unit. Other structures must have a 15
minute thermal barrier as per 334.10(3).

I usually keep wiring, switches, and receptacles at 48" in garages as
gasoline vapors sit low and I use only metal boxes so there is no question
about fire rating. For exposed wiring I try to use EMT conduit (Metal)
whenever possible.

Your best bet is to contact your building department to get clarification on
the exposed Romex issue.


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