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#128974 - 06/09/04 09:37 AM Parallel conductors  
ayrton  Offline
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Joined: Dec 2001
Posts: 201
Pa
Why do you think the code prohibits running parallel conductors smaller than 1/0??


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#128975 - 06/09/04 12:00 PM Re: Parallel conductors  
Creighton  Offline
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Joined: Jan 2002
Posts: 59
Hayward, CA
If you study the ampacity tables you will see that in the larger sizes of wire an increase in size results in relatively little increase in ampacity. Forinstance, a 50% increase from 10 kcmil to 10.5 kcmil results in an increase in carrying capacity in amperes of less than 15%.
There is no need to parallel conductors smaller than 1/0 because the difference between the carrying capacity in these sizes is much less pronounced.
Although the NEC places the limit, it is really physics that limits paralleled conductors to 1/0 and larger.
Creighton



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