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#46693 12/30/04 11:50 PM
Joined: Jul 2004
Posts: 129
hypress Offline OP
Was talking with a friend of mine today and we were wondering why someone has not developed a plenum rated Romex. If they can do it for low voltage why not high voltage?

#46694 12/31/04 12:21 AM
Joined: Dec 2003
Posts: 886
I would say because you can't use romex above a hung ceiling in commercial jobs. What would the demand for it be?

OR are you saying that a plenum rated romex would change all that and COULD be used in air handling spaces above a hung ceiling?


#46695 12/31/04 12:47 AM
Joined: Jul 2004
Posts: 129
hypress Offline OP
Plenum rated romex could be used above a ceiling and above the 3rd floor in a structure

#46696 12/31/04 01:08 AM
Joined: Apr 2002
Posts: 2,527
This groovy “new-tech” NM-B seems to hint at a future plenum-rated cable. In the second link, mention is made of compressed stranding, but it’s not clear if 14-10 are solid or stranded. [I hate solid conductors but have rarely touched NM-B.],1443,0_1813,00.html

[If I had to wire a house at gunpoint, I’d want FREP tray cable to do it, and regularly take the inspector out for a lot of drinking—but not before 1:30. Some work has to at least look like it’s progressing.]

#46697 12/31/04 03:25 AM
Joined: Dec 2003
Posts: 886
Don't see how that hints at a possible plenum rated cable at all.

There is a lot of politics here, that's why you will never see it. The same reason you can't use tray cable in place of NM even though it exceeds NM specs in every way.


#46698 12/31/04 10:03 AM
Joined: Apr 2004
Posts: 201
There is a lot of politics here, that's why you will never see it.
No kidding, the steel tube people do not want NM cable use to be expanded. Also, the plastics people (mostly Carlon) do not want NM use expanded. Between them, they carry a lot of weight on the Code Making Panel. [Linked Image]

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