ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Inspections and Testing
by gfretwell. 04/20/18 08:44 PM
FEMA height and electrical equiment.,
by HotLine1. 04/20/18 08:49 AM
This anti-theist is priceless!!!
by LongRunner. 04/19/18 04:02 PM
Recall notice: Square D Services Switches
by gfretwell. 04/18/18 01:24 PM
Big Square D service switch Recall
by sparkyinak. 04/18/18 12:30 AM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
1 registered members (Tjia1981), 7 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Hot electrical room #195179
07/15/10 02:20 AM
07/15/10 02:20 AM
W
wacked  Offline OP
Member
Joined: Dec 2006
Posts: 33
I was wondering if anybody knows what is the acceptable ambient air temperature for an electrical room. I did a check on a facility that I am an FSR for (that has more heat producing devices...transformers etc after a new addition) Much to my horror the temperature was 45 degrees celcius. Apparently when the construction for this new addition is totally complete there will be remediation concerning this hot electrical room.
The CEC talks about ventilation, but does anybody have a firm number or know where I can find????

Tools for Electricians:
Re: Hot electrical room [Re: wacked] #195198
07/16/10 12:20 PM
07/16/10 12:20 PM
J
jay8  Offline
Member
Joined: Jul 2005
Posts: 183
Vancouver, BC
that is an interesting problem. Check 6-206 (c) which clearly states 30 degrees. Also 4-004 (8) which calls for conductor derating past 30 degrees. And as you pointed out, 2-318.

Re: Hot electrical room [Re: jay8] #195246
07/21/10 06:39 PM
07/21/10 06:39 PM
M
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
As Jay states 30 degrees. Hotter, and the equipment must be derated.
Wire is derated per table 5A. 45 C is .85


Featured:

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

 

Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
245,868 Are you busy
182,918 Re: Forum
172,743 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 15 (0.004s) Memory: 0.9501 MB (Peak: 1.0743 MB) Zlib enabled. Server Time: 2018-04-22 06:36:46 UTC