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#7716 - 02/17/02 06:27 PM Sub-panel
Boomer Offline
Junior Member

Registered: 02/16/02
Posts: 5
Question, If a sub-panel is being feed from a breaker in a main-panel thru a square wireway,can branch circuits wires be in the same square wireway as the wires feeding the sub-panel? Boomer

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#7717 - 02/18/02 04:14 AM Re: Sub-panel
sparky Offline

Registered: 10/18/00
Posts: 5545
i see no violation in feeders & branch circuits occuping the same space....

#7718 - 02/18/02 04:19 AM Re: Sub-panel
Frank Cinker Offline

Registered: 07/29/01
Posts: 317
Loc: Pennsylvania
If your question is: Can feeder conductors be installed the same raceway as branch circuit conductors, the answer is yes.

Don't forget to derate if applicable.

#7719 - 02/18/02 04:17 PM Re: Sub-panel
CTwireman Offline

Registered: 02/07/02
Posts: 839
Loc: Connecticut, USA
Check out 230-7. Feeders and branch circuits cannot occupy the same space as service conductors.
So, there is no violation as long as there are no service conductors in the wireway you mentioned. Since you metioned that this is a sub-panel, I dont see a problem.

See page 101 of Mike Holt's "Understanding the NEC 1999" if you have it. It explains this sitation really well.

[This message has been edited by CTwireman (edited 02-18-2002).]

#7720 - 02/19/02 05:24 AM Re: Sub-panel
electure Offline


Registered: 12/24/00
Posts: 4226
Loc: Fullerton, CA USA
See 362-5 or 376.22
If you exceed 30 current carrying conductors, you'll have to derate to 40% up to 40 conductors, or 35% beyond that.
Up to 30 conductors, derating is not applicable.
I'm the big "Gutter Complainer" of the group
Edited 'cause I used the wrong article.[foot in mouth] Thanks, Joe![/foot in mouth]

[This message has been edited by electure (edited 02-19-2002).]

#7721 - 02/21/02 03:06 PM Re: Sub-panel
Steve Miller Offline

Registered: 08/30/01
Posts: 322
Loc: Loudoun Cty, VA
Well Boomer, if we can't ...let's just say there are "several" illegal sub panels in the DC/VA area.


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