ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
1913 American Electrician's Handbook
by annemarie1. 07/27/17 03:10 PM
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 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:
Housebilding DIY wiring
Popular Topics(Views)
239,365 Are you busy
174,822 Re: Forum
167,212 Need opinion
Who's Online Now
0 registered members (), 62 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#89125 - 09/03/04 04:07 PM Cables in suspended ceiling  
Bill39  Offline
Member
Joined: Nov 2001
Posts: 75
Indianapolis, IN, USA
I'd like some opinions on if this type installation would meet the NEC:

Short version: When can shielded cables be ran in a suspended ceiling and not be in a raceway? Two types of cables, one with 120VDC for small motors and other is 24VDC for sensors, & encoders.

Long version:
Have a large custom control panel (120VAC max) and some test stands w/small DC motors, encoders, and sensors. All are in a lab/testing room. We need to run shielded cables between the control panel and test stands. Conduits (1 for low voltage & 1 for 120VDC) will extend up into a suspended ceiling and end. In the ceiling the cables are to be supported by the metal joists, and ty-rapped together.


2017 / 2014 NEC & Related Books and Study Guides

#89126 - 09/03/04 04:34 PM Re: Cables in suspended ceiling  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
Two questions spring to mind, is this a fire rated ceiling and is this a plenum for return air?


Greg Fretwell

#89127 - 09/03/04 04:38 PM Re: Cables in suspended ceiling  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Are these cables a chapter 3 wiring method?


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#89128 - 09/04/04 12:20 PM Re: Cables in suspended ceiling  
hbiss  Offline
Member
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
Not so much as would they need to be run in a raceway but what is the required wiring method. I doubt any would have to be run in raceway if the correct wiring is used.

Even with raceway you will have to determine whether these circuits are CL1, 2 or 3 and proceed from there. If any are CL1 you may not be able to use the wire you have even with raceway.

-Hal



Member Spotlight
waymag
waymag
dallas, texas, USA
Posts: 67
Joined: January 2002
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 14 (0.003s) Memory: 0.7601 MB (Peak: 0.8926 MB) Zlib enabled. Server Time: 2017-07-27 22:46:37 UTC