ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 10
Admin 4
Recent Posts
Correct rotation, wrong sequence
by Potseal. 05/25/17 11:34 PM
Dryer, Range grounding from "Main" panel
by sparkync. 05/25/17 05:49 PM
210.70 / Wall Switch / When adopted?
by gfretwell. 05/24/17 09:18 PM
Any UL 508 experts out there?
by sparkyinak. 05/23/17 11:04 PM
Heat pump conundrum
by sparkyinak. 05/21/17 08:49 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
236,823 Are you busy
171,843 Re: Forum
164,747 Need opinion
Who's Online Now
0 registered members (), 63 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#94104 - 07/06/05 05:57 PM Transformer in plenum ceiling?  
boggerbutt2454  Offline
Member
Joined: Feb 2005
Posts: 44
Concord NC USA
Is this legal or not? I know you can install one above a suspended ceiling but can you if it is a plenum ceiling?


2017 / 2014 NEC & Related Books and Study Guides

#94105 - 07/07/05 04:05 PM Re: Transformer in plenum ceiling?  
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
I don't see a problem installing a transformer in a space above the ceiling as discribed in 300.22(C). If however, it is indeed a plenum as discribed in (B) you may have a problem. There are other considerations in Article 450 that need to be addressed also such as accessibility and size of transformer.


George Little

#94106 - 07/07/05 05:54 PM Re: Transformer in plenum ceiling?  
boggerbutt2454  Offline
Member
Joined: Feb 2005
Posts: 44
Concord NC USA
It is a 45 KVA transformer and it is vented.
I have never done this before as I was told it would have to be a sealed transformer or in an enclosure. It was explained that the dust and lint that is being sucked into the plenum could build up on the windings of a vented transformer and the heat from the transformer could ignite it. This installation would take place in a clothing store in a mall.



Member Spotlight
Posts: 165
Joined: March 2007
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: 0.009s Queries: 14 (0.002s) Memory: 0.7507 MB (Peak: 0.8746 MB) Zlib enabled. Server Time: 2017-05-26 18:58:45 UTC