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Hot electrical room #195179
07/15/10 01:20 AM
07/15/10 01:20 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????

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Re: Hot electrical room [Re: wacked] #195198
07/16/10 11:20 AM
07/16/10 11:20 AM
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 05:39 PM
07/21/10 05:39 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


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