I can't seem to find anything in the NM or PVC section that says I can't put 12/2 romex through 3/4 PVC in a house. It's going from a kitchen plug to a island plug through a slab in a residence. I had it all set up to just fish thhn through it but the builder now needs to adjust the island so now it would be better to just run a 12/2 through it and set the island over the conduit instead of it coming through the cabinet with a four sq box. Is this allowed?
NM-B in conduit?
- Thread starter crtemp
- Start date
- Status
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Yes. The only code against NM in conduit is the conduit/raceway can't be outside in a wet location. The code now considers the inside of a raceway in wet locations as a "wet location". NM is permitted only in normally dry locations.
So NM is fine in a conduit inside.
- Location
- Massachusetts
A slab on grade is a wet location, you cannot use NM for that.
You could use UF.
You could use UF.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Art. 334.10(A) states nm is to be installed in a dry location. Art. 300.5 states the interior of raceways installed underground shall be considered wet location. Also look at 300.9 even though this does not pertain to your install.
Nom Deplume
Senior Member
- Location
- USA
NM inside the island cabinet is also subject to physical damage and is not allowed.
iggy2
Senior Member
- Location
- NEw England
Your PVC is merely a sleeve into which you may run any allowed wiring method.
If a wet location, NM not allowed as noted above. If not otherwise protected, inside of island cabinet could be considered subject to damage, so again, NM not allowed. (We had an inspector refuse to allow a SHORT length (like 3") of NM coming out of the wall to feed into the back of undercabinet light fixtures, as he felt it was subject to damage....)
You could consider FMC, LFMC (if wet), AC, MC, etc in your sleeve.
If a wet location, NM not allowed as noted above. If not otherwise protected, inside of island cabinet could be considered subject to damage, so again, NM not allowed. (We had an inspector refuse to allow a SHORT length (like 3") of NM coming out of the wall to feed into the back of undercabinet light fixtures, as he felt it was subject to damage....)
You could consider FMC, LFMC (if wet), AC, MC, etc in your sleeve.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
He must have a pretty bizarre use of his own kitchen area because most of the time this would be a pretty safe area from physical damage:roll:
- Occupation
- Licensed Electrician
Which of these are allowed when exposure to physical damage need be taken into consideration?
- Location
- Massachusetts
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Thanks I knew that was there but couldn't find it. Definitions -- I often forget to look there
- Location
- Massachusetts
iggy2
Senior Member
- Location
- NEw England
IMO, any of them. They all offer some metallic protection to the conductors. Since NM is non-metallic, LFNC would probably not be a good choice since it and NM are, well, NM, if this is a wet location application.
- Status