ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Dimmable LED 2x4 lay in fixtures
by Potseal. 04/23/17 07:18 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
Electrode boilers question
by SteveFehr. 04/21/17 08:32 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,650 Are you busy
169,334 Re: Forum
162,672 Need opinion
Who's Online Now
0 registered members (), 86 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#210364 - 06/17/13 07:14 PM nmd90 used in pvc pipe and under deck  
cdnrebel  Offline
New Member
Joined: Jun 2013
Posts: 5
canada
I know this must have been asked before but I cannot find information. Table 19 nmd90 used in dry and damp locations, note 15. What is thermoplastic jacket? I am running #6 to pony panel in a pool shed, using pvc pipe underground 30 feet, under a deck for 10 feet then into house. Any suggestions?


Tools for Electricians:

#210365 - 06/18/13 03:44 PM Re: nmd90 used in pvc pipe and under deck [Re: cdnrebel]  
twh  Offline
Member
Joined: Mar 2004
Posts: 905
Regina, Sask.
I think an underground raceway is a wet location. You can't put nmd90 in a wet location. ("d" is for dry?). Pulling a cable into a raceway is controversial. It seems you can put it in a water line but some inspectors won't allow it in pvc, because pvc is a raceway and a water line isn't.

I would probably use teck and direct bury. teck is good for anything, including rodents. The other option is nmwu.


#210390 - 06/19/13 10:49 AM Re: nmd90 used in pvc pipe and under deck [Re: cdnrebel]  
jdevlin  Offline
Member
Joined: Aug 2002
Posts: 402
welland ontario canada
Thermoplastic jacket is the plastic outer casing on the cable.
AC90 has a metal jacket as opposed to the thermoplastic jacket.


#210423 - 06/21/13 05:45 AM Re: nmd90 used in pvc pipe and under deck [Re: cdnrebel]  
cdnrebel  Offline
New Member
Joined: Jun 2013
Posts: 5
canada
Thanks for the replies. I guess the main thing is pipe underground is wet location. I guess under a deck which the board are tight together would also be wet location. I did not get the Table 19 nmd90 note 15. All nmd90 has thermoplastic jacket on the wire, so why mention it?


#210425 - 06/21/13 10:39 AM Re: nmd90 used in pvc pipe and under deck [Re: cdnrebel]  
jdevlin  Offline
Member
Joined: Aug 2002
Posts: 402
welland ontario canada
Older NM cable has paper and tar type insulation. Not sure if it was called NMD90 though. It had names like NMD7. There is probably no requirement for it to be thermoplastic and possibly someone could make it the old way.

Last edited by jdevlin; 06/21/13 10:40 AM.


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: 0.014s Queries: 15 (0.002s) Memory: 0.7662 MB (Peak: 0.9084 MB) Zlib enabled. Server Time: 2017-04-24 15:19:23 UTC