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#90632 - 12/06/04 10:02 AM Gutter Sizing
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
Hi,
I have 18 - 1" conduits that need to go to a gutter.

314.28(A)(1)covers this right? Only #4 and larger though. Anything smaller and it is based on condcutors right?

I guess a gutter that has no terms in it is a pull box?

Are there specific sections that refer to a "Gutter" or is this the same as "Pull Box"?

Thanks for any replies.

-regrads

MUSTANG


[This message has been edited by mustangelectric (edited 12-06-2004).]
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2014 / 2011 NEC & Related Books and Study Guides
#90633 - 12/06/04 02:28 PM Re: Gutter Sizing
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: Shinnston, WV USA
See Article 366 and Article 376.

You are allowed a 20% fill and up to 30 current carrying conductors. If you exceed 30 conductors, you have to do the derating per table 310.15(B)(2)(a)

Essentially, they are the same thing, they just differ in how they are used.

Tom

[This message has been edited by Tom (edited 12-06-2004).]

[This message has been edited by Tom (edited 12-06-2004).]
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#90634 - 12/07/04 12:24 PM Re: Gutter Sizing
mustangelectric Offline
Member

Registered: 02/08/04
Posts: 496
Loc: Bentonville, AR
Hi,
312.6(A) cover gutters too right?

Thanks for the help.

-regards

Mustang
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#90635 - 12/07/04 02:35 PM Re: Gutter Sizing
Ryan_J Offline
Moderator

Registered: 08/19/03
Posts: 1355
Loc: West Jordan, Utah, USA
Yes Mustang, 312.6 applies too. There was a change in the 2005 to address this more clearly, stating that the "one wire per terminal" column is to be used, even if you have conductors in parrallel.
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