ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 263 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#84752 04/30/03 10:19 PM
Joined: Jun 2001
Posts: 196
C
Cindy Offline OP
Member
sealtite or liquidtight flex, lfmc [but not lfnc] is ok up to 4' lengths for use in plenums based on 300.22 but does it need a letter "p" on it like the limited energy cables? or are they all ok? any sealtite fittings ok too? or labeled only?

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#84753 05/04/03 10:14 AM
Joined: Mar 2003
Posts: 36
U
Member
I don't believe that there is such a thing as "P" or "Plenum Rated" sealtight. I'm from Chicago, and we alwways had [and still do], a very stringent code for plenum areas. All we could use was sealtite fro some time, along with plenum rated boxes and covers, and special city of Chicago Plenum Rated fixtures. Not too long ago, a new product called FMT,[flexible metallic tubing], was put into use. It would seem to be a corrugated metal version of what in other parts of the country is called "smurf tube". It's intention was to decrease the amount of PVC [covering the fixture and box whips], in plenum spaces. You can imagine that we have a huge number of high rises, and data processing centers, as well as the stock and futures exchages here in Chicago, so the exposure of a problem was great.

While the cost of things penum rated has dropped shomewhat with the proliferation of things like plenum rated cable and wire ties, I think that if it was made, it would be $$$.

Gregg

#84754 05/04/03 07:48 PM
Joined: Apr 2002
Posts: 2,527
B
Moderator
There are products like: "Sealtite ZHUA…which when exposed to fire will not support flame and will not give off toxic emissions …trade sizes from 3/8” thru 2”… [but not currently a listed item.]


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5