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Old 05-25-2013, 04:45 PM   #1
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Can type nm-b wire be used outside in conduit?


Can type nm-b (14-3) romex wire be used outdoors if placed in conduit to add additional receptacles to the back of a house/

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Old 05-25-2013, 04:55 PM   #2
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Depends on your local ordinances. I personally wouldn't. If using all conduit outside, pull THHN/THWN instead of Romex.

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Old 05-25-2013, 05:51 PM   #3
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No. Romex+outside in conduit= wet location.
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Old 05-25-2013, 05:58 PM   #4
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Conduit which is not subject to any weather would be OK, but very few outdoor locations fit that description. The bottom line is this: if you could use NM there without conduit, then you could sleeve it in conduit. If you can't use NM there without conduit due to weather exposure, then adding conduit doesn't get you anything. The inside of a conduit in a wet location is a wet location.
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Old 05-25-2013, 06:31 PM   #5
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Quote:
Originally Posted by diyer111 View Post
Can type nm-b (14-3) romex wire be used outdoors if placed in conduit to add additional receptacles to the back of a house/
no......
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Old 05-25-2013, 08:01 PM   #6
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You would need to use UF cable, or most likely THHN/THWN Wires since you want to run 14/3.
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Old 05-25-2013, 09:08 PM   #7
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NO ...

history in the making we all agree ...
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Old 05-25-2013, 10:12 PM   #8
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One thing over here it will be the same rules no NM cable on outdoor location as well only UF cable or THHN/THWN or SWA ( steel wire armoured cable ) is one of few most common allowed items we can use on outdoor useage over here in France.

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Old 05-25-2013, 10:40 PM   #9
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Pvc...sch 40 or 80(depends)....then thhn/thwn..... about 20 cents a foot..equals done right
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Old 05-25-2013, 10:46 PM   #10
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You can stub out NM to a outlet box or base plate for a light on the side of the house, and that is it. Otherwise, UF if going out any further than 8 inches from the side of the home, or THHN/THWN in conduit.
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Old 05-25-2013, 11:37 PM   #11
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Where did this 8 inch rule appear from?
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Old 05-26-2013, 12:02 AM   #12
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Quote:
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Where did this 8 inch rule appear from?
...the p*** industry
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Old 05-26-2013, 12:02 AM   #13
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Quote:
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Where did this 8 inch rule appear from?
Who says that it has to be a rule. There is this thing called common sense, which most of us use, when we do stuff. Six inches from the back of the box is allowable for giving you enough wire to attach a switch, outlet, or wire nut, but I just threw the eight inch statement out there, because as we say in my neck of the woods, "a little extra always helps, when doing something the right way."

If you have not realized, we are not code compliance officers, nor are we to enforce the codes of the areas that people live in, that post on here. We are just a group of people trying to have a round table discussion in what is best to do in a situation, and how to do it in a way, that it will not cause problems later on, if you either have to go and sell the place, due to not required to pull a permit to do the work, if your area does not require it, or if your area does require a permit, you have at least enough basic info, that you can take that and research further to find out exactly how to do it the way your AHJ wants it done.
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Old 05-26-2013, 12:03 AM   #14
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Quote:
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...the p*** industry
That does not even pass in that industry as allowable.
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Old 05-26-2013, 12:05 AM   #15
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But you're throwing hard numbers out there like it's written somewhere....and it's not.

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