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#79219 - 12/07/01 01:42 PM NEC 310.15 (B) (2) (a)  
mdsmith  Offline
Junior Member
Joined: Dec 2001
Posts: 5
When you install 120V, single phase circuits in a raceway, each with a separate neutral, do you count the neutrals when applying the provisions of 310.15(B)(2)(a)? or does 310.15(B)(4)(a) apply to this situation?


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#79220 - 12/07/01 02:03 PM Re: NEC 310.15 (B) (2) (a)  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Each neutral carries the same current at the associated phase conductor and therefore must be counted as current carrying conductors.
Don(resqcapt19)


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#79221 - 12/07/01 06:43 PM Re: NEC 310.15 (B) (2) (a)  
Steve Miller  Offline
Member
Joined: Aug 2001
Posts: 325
Loudoun Cty, VA
In a word... yes. If you have a shared neutral on a single phase multiwire circuit it would not count.


#79222 - 12/08/01 08:47 AM Re: NEC 310.15 (B) (2) (a)  
Glenn  Offline
Member
Joined: Jan 2001
Posts: 75
Steve,

Isn't that on linear loads?

Non-linear loads using a multiwire method ( N-A-B-C ), the neutral is considered a current carrying conductor. 220-22 FPN#2, 310-15(b)(4)(c).


#79223 - 12/09/01 01:10 AM Re: NEC 310.15 (B) (2) (a)  
electure  Offline


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Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
Absolutely. Each neut carries the full load.

[This message has been edited by electure (edited 12-09-2001).]



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