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derating factors for enclosed conductors


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#1 oskin

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Posted 04 January 2006 - 08:55 PM

I am hoping someone will be able to give me the specific derating factor for the current carrying capacity of conductors enclosed in air. I also need the source of the info ie ref to a standard.
I have looked at a number of cable handbooks and standards and codes and have found heaps on enclosed conductors in thermal insulation and overall derating factors but have not been able to pin down this specific factor. eg of application: internal cabling run in wiring duct of a metalic switchboard.
I need this to extrapolate data from manufacturers handbook.
i hope someone can help me out.
Oskin

#2 pw_lock

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Posted 29 April 2006 - 04:33 PM

try the IEE wiring regulation (cannot remmember he exact BS no.)

#3 tc50

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Posted 10 April 2007 - 08:30 AM

BS7671

QUOTE(pw_lock @ Apr 30 2006, 12:33 AM) View Post

try the IEE wiring regulation (cannot remmember he exact BS no.)



#4 AB2005

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Posted 10 April 2007 - 11:36 AM

Read the topic in the following links
http://www.lmpforum....?...

http://www.lmpforum....?...

"Don't assume any thing, always check/ask and clear yourself".





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