Romex to AC Disconnect

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Greentagger said:
If disconnect is mounted on exterior a sleeve will be required since nm is not permitted in damp or wet locations per 334.12(A)(4). Also not permitted to be embedded in masonry 334.12(2). Exterior enclosures will have 1/4” gap per 404.4 and to comply with 312.2. So without a sleeve your nm will be in a damp or wet location.
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Running a cable through a drilled hole is not "embedded in masonry."

The area at the back of the disconnect and around the building penetration should be sealed with silicone or similar so I do not see that as wet or damp.
 
electrofelon said:
Running a cable through a drilled hole is not "embedded in masonry."

The area at the back of the disconnect and around the building penetration should be sealed with silicone or similar so I do not see that as wet or damp.
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I agree, we've been wiring them that way for as long as there have been AC disconnects.
 
Now I ask, where are all those that said doing this install with NM would be a violation. I'm glad to hear its compliant but just confused. Use to be even when running PVC outside would require THWN conductors but now reading these responses it doesn't appear so.
 
GMc said:
Now I ask, where are all those that said doing this install with NM would be a violation. I'm glad to hear its compliant but just confused. Use to be even when running PVC outside would require THWN conductors but now reading these responses it doesn't appear so.
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The NEC specifically states that the inside of a raceway run in wet location is a wet location. It makes no such mention about the inside of a disconnect mounted in a wet location.
 
Correct
infinity said:
The NEC specifically states that the inside of a raceway run in wet location is a wet location. It makes no such mention about the inside of a disconnect mounted in a wet location.
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. Correct. Only the 1/4” to get to the disconnect.🤔
 
infinity said:
The NEC specifically states that the inside of a raceway run in wet location is a wet location. It makes no such mention about the inside of a disconnect mounted in a wet location.
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Happen to read any of the arguments in the thread I posted?
 
GMc said:
Happen to read any of the arguments in the thread I posted?
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I did and I can see the point about the 1/4" gap but as stated in that thread and by electrofelon in this thread the penetration is sealed so there is no issue.
 
GMc said:
Happen to read any of the arguments in the thread I posted?
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didn't read whatever thread you posted, do know this topic has been beaten like a dead horse in the past with no definite answer either way. Seems majority are permitted to enter back of outdoor enclosure with NM cable but some have AHJ that won't allow it. That is about the only real answer there is IMO.

You are welcome to try to submit changes NFPA to clarify this or you can live with what the AHJ lets you do.
 
kwired said:
do know this topic has been beaten like a dead horse in the past with no definite answer either way.
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Your not kidding!

and because I didn't see anyone even question the installation in this thread I thought I missed a code change along the way so I had to ask. :unsure:

You are welcome to try to submit changes NFPA to clarify this or you can live with what the AHJ lets you do.
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Hasn't helped when others have tried in the past so I'll just hope for a reasonable inspector.. :)

Thanks
 
infinity said:
The NEC specifically states that the inside of a raceway run in wet location is a wet location. It makes no such mention about the inside of a disconnect mounted in a wet location.
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I agree. The only trick would be to somehow get the NM to the 3R disconnect. It sounds like you are saying its ok to run NM in PVC if its only for a 1/4" and it has some silicone on it.


infinity said:
I did and I can see the point about the 1/4" gap but as stated in that thread and by electrofelon in this thread the penetration is sealed so there is no issue.
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They talk about more than just the 1/4".
post 7
post 9
post 11 real reasonable inspector here, no sense at all.
post 36

Thanks again.
 
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