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NEC 310.15 (B) (2) (a) #79219
12/07/01 12:42 PM
12/07/01 12:42 PM
mdsmith  Offline OP
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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Re: NEC 310.15 (B) (2) (a) #79220
12/07/01 01:03 PM
12/07/01 01:03 PM
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
Each neutral carries the same current at the associated phase conductor and therefore must be counted as current carrying conductors.

Re: NEC 310.15 (B) (2) (a) #79221
12/07/01 05:43 PM
12/07/01 05:43 PM
Steve Miller  Offline
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.

Re: NEC 310.15 (B) (2) (a) #79222
12/08/01 07:47 AM
12/08/01 07:47 AM
Glenn  Offline
Joined: Jan 2001
Posts: 75

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).

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

Joined: Dec 2000
Posts: 4,276
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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