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#83423 - 01/30/03 05:06 PM Cable Tray  
mountainman  Offline
Member
Joined: Jan 2002
Posts: 54
Richmond Va. U.S.A.
I am refering to the 1996 NEC Handbook, on page 255 article 318-11 the book has a diagram 318-3 shows a one cable distance between each cable. I cannot find a code reference that says you shall maintain one cable width between each cable. What I have is MC cable with 4 5ookcmil conductors. Is there a mandatory spacing requirement, and if so what is the code reference. Thanks Joe


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#83424 - 01/30/03 05:55 PM Re: Cable Tray  
txsparky  Offline
Member
Joined: May 2001
Posts: 552
Magnolia,.Texas U.S.A.
I dont have my 96 with me but in the 99NEC 318-11 the spacing is allowed for ampacity reasons(derating)

[This message has been edited by txsparky (edited 01-30-2003).]


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#83425 - 01/30/03 06:05 PM Re: Cable Tray  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
The spacing configuration you refer to permits ampacities in accordance with Table B.103.3 in Annex B of the '02 code.
Otherwise, 392.9 refers to tray fill based on cable sizes.

[This message has been edited by Redsy (edited 01-30-2003).]


#83426 - 01/31/03 10:27 AM Re: Cable Tray  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
FYI - There is a website with application answers, sponsored by cabletray manufacturers - http://www.cabletrays.com/



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