It can be any of the conductors in 310.13(A) that are suitable for branch circuit wiring or one that is identified for use in the cables and rated at 90 C.
From Southwire:That would only apply to one manufacturer.
This is somewhat of a loaded question in that NM basically stands for nonmetallic. But sense NM nonmetallic has been in use for a long time one must understand the difference between the older NM cable that the NM-B that we use today.
Even so, they say you can't use the conductors alone.From Southwire:
The conductors inside of our Romex products are listed as THHN only. You are correct in the statement that most conductors are multi rated. Romex is listed as a complete product and the conductors SHALL NOT be used with out the outer jacket. It can only be used as Romex and where Romex is approved for use by the NEC.
New Products/Applications Engineer
Who else makes NM cable? we can check their specs as well.
Best answer.It really doesn't matter because you can only use it as a cable assembly.
Agree that you have to use it as a cable assembly, but if the individual conductors are THWN then it can be used outside. (eg, sleeving romex through a liquid tight for an A/C unit).It really doesn't matter because you can only use it as a cable assembly.
I thought, (because of Katrina), that we learned Romex outside willnot work, the paper inside gets wet, molds and eats the insulation of the wire.Agree that you have to use it as a cable assembly, but if the individual conductors are THWN then it can be used outside. (eg, sleeving romex through a liquid tight for an A/C unit).
The OP didn't ask if the conductors can be used outside of the cable.
Ditto. I have found it to be strange that the actual wire has no markings. I would see it as being simple where in the wire manufacturing process the wire is taken from. To purposely use unmarked wire is an interesting concept.Maybe it's just me but I find this whole process to be silly. Why can't the conductors be required to be THHN/THWN-2 and marked on the conductor like it is when I buy a spool of wire. From everything I've heard I would guess that dual rated (THHN/THWN-2) wire is more readily available and cheaper to manufacture than a plain old 90? conductor. So when needed one can strip a piece of NM and use the conductors individually. Even though this isn't permitted I'm guessing that it's a very common installation practice.
So you can buy two of the same product but think that they are different.Ditto. I have found it to be strange that the actual wire has no markings. I would see it as being simple where in the wire manufacturing process the wire is taken from. To purposely use unmarked wire is an interesting concept.
Rodger that. I got some leftover scraps of jacket that have not been split in half, a couple rolls of Scotch 33, and some Gorilla Glue.... Where do we meet?Strictly speaking according to the Southwire response , most all dwelling load centers have been ul violations if they utilize any removal of "romex" cable jacket in the installation. ....... We best be getting busy going back and fixing all them bad installs....