ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Extension cords
by Texas_Ranger. 09/25/18 04:37 AM
220/230/240V 60Hz Systems
by gfretwell. 09/23/18 02:50 PM
Inspection camera help
by petey_c. 09/22/18 07:52 AM
Motion detectors and dimmers
by gfretwell. 09/20/18 04:02 PM
Acronis Backup 2017
by gfretwell. 09/16/18 12:46 AM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
0 registered members (), 33 guests, and 18 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Communications Wiring #79467
12/29/01 01:08 AM
12/29/01 01:08 AM
J
jclark  Offline OP
Junior Member
Joined: Dec 2001
Posts: 2
Boise, ID USA
Does communications wiring (phone, CAT5E, coax, sound system) wiring need to be plenum rated when installed in the walls of a commercial building (the wall space is not used as a plenum in this case)?

2017 / 2014 NEC & Related Books and Study Guides
Re: Communications Wiring #79468
12/29/01 05:21 PM
12/29/01 05:21 PM
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
See the Definition of a "Plenum" in Article 100; and then see Section 300-22, and Articles 640; 800; and 820 in the 1999 NEC.
For those who ask these types of questions on this BB help is always available with specific references to the NEC.

If you don't have a code book you can order one here from the ECN Bookstore.

In the end the rules you really need are in Section 300-22(c)and in each Article that includes references to this section.

Why do you ask this question?


Joe Tedesco, NEC Consultant
Re: Communications Wiring #79469
12/30/01 01:20 AM
12/30/01 01:20 AM
J
jclark  Offline OP
Junior Member
Joined: Dec 2001
Posts: 2
Boise, ID USA
I ask because my local Home Depot employees who claim to be electricians told me that any communications cable installed in a commercial building must be plenum rated. (They don't even know what a plenum is). I am aware of the definition of a plenum. And from everything I can find in the code, I only have to use plenum rated cable when installing in a plenum. But, I'm trying to get other input, because, once again, the Home Depot guys sware that that's the rule - ANY commercial wiring.

Re: Communications Wiring #79470
12/30/01 07:47 AM
12/30/01 07:47 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,274
Fullerton, CA USA
Have the Home Depot "ulektrishon" look at the data/com wiring in his store.
Then, he should either digress, or report the (not a) violation he finds to the local Code Enforcement Officials.
You answered the Q yourself in the last part of your 1st post. Unless there's a specific reason (plenum ceiling, etc) to use p-rated cable, it's not required, commercial or not.
No more than you'd need sealtite in a dry location.

(On second thought maybe this guy should have any area he's in rated as a plenum. He certainly spouts some hot air!) [Linked Image]

[This message has been edited by electure (edited 12-30-2001).]

Re: Communications Wiring #79471
01/03/02 12:07 AM
01/03/02 12:07 AM
E
Elzappr  Offline
Member
Joined: Dec 2001
Posts: 270
Oregon
Disregard the Home Depot guys..after all, if they were electricians, they wouldn't be working at Home Depot! I suppose that if the commercial above-ceiling space was used as a plenum then the wall board would go all the way up to the top plate..if not, then the stud spaces would be the same air space as the plenum, and plenum rated cable would be required.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
waymag
waymag
dallas, texas, USA
Posts: 68
Joined: January 2002
Show All Member Profiles 
Top Posters(30 Days)
Admin 13
BigB 4
Popular Topics(Views)
249,456 Are you busy
187,375 Re: Forum
176,715 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 14 (0.005s) Memory: 0.9682 MB (Peak: 1.1084 MB) Zlib enabled. Server Time: 2018-09-25 17:03:18 UTC