ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/21/17 09:27 AM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,199 Are you busy
174,590 Re: Forum
167,024 Need opinion
Who's Online Now
0 registered members (), 55 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#92171 - 03/03/05 11:40 AM NEC says Riser Rated Cat5 in Residence?  
vermonster  Offline
Junior Member
Joined: Mar 2005
Posts: 2
NEK, VT USA
I'm the GC on the renovation of a 1780 post&beam farmhouse.

Currently have some disagreement on the job site. Some feel that because communication wiring is run in the unblocked wall from basement to 2nd floor, riser rated cable is required. Others disagree and state the NEC indicates type CM is always sufficient for single family residential dwellings.

Can somebody point me one way or the other.

As about 50% of the place is already wired in CM, we are hoping this meets the NEC, but will rewire if required.

Thanks

George


2017 / 2014 NEC & Related Books and Study Guides

#92172 - 03/03/05 12:15 PM Re: NEC says Riser Rated Cat5 in Residence?  
eesac  Offline
New Member
Joined: Feb 2005
Posts: 8
california
I do not believe you need riser rated cables in residences, see 1999 NEC 800-53-b exception #2, which basically allows CM or CMX cables in one and two family dwellings. The newer NEC will probably read the same.


#92173 - 03/03/05 03:21 PM Re: NEC says Riser Rated Cat5 in Residence?  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
NEC 2002 made this positive language
800.53(B) Riser. Cables installed in risers shall comply with 800.53(B)(1), (B)(2), or (B)(3).
...
(3) One- and Two-Family Dwellings. Type CM and CMX cable shall be permitted in one- and two-family dwellings.

NEC2005 moved this to 800.154 but the language didn't change


Greg Fretwell

#92174 - 03/03/05 03:57 PM Re: NEC says Riser Rated Cat5 in Residence?  
vermonster  Offline
Junior Member
Joined: Mar 2005
Posts: 2
NEK, VT USA
Many thanks. It is quite clear that type CM is sufficient in single family dwellings regardless of whether the space is considered a "riser" or not.

Elsewhere someone had suggested:
725.61(B)(3), since it allows CL2 and CL3 in 1-2 family dwellings and the cable hierarchy allows substitution of type CM where CL2/3 is allowed.

George



Member Spotlight
watersparkfalls
watersparkfalls
Washington...Not DC
Posts: 216
Joined: March 2005
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.013s Queries: 14 (0.003s) Memory: 0.7600 MB (Peak: 0.8899 MB) Zlib enabled. Server Time: 2017-07-22 08:52:55 UTC