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Parallel conductors #128974 06/09/04 08:37 AM
Joined: Dec 2001
Posts: 201
A
ayrton Offline OP
Member
Why do you think the code prohibits running parallel conductors smaller than 1/0??

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Re: Parallel conductors #128975 06/09/04 11:00 AM
Joined: Jan 2002
Posts: 59
C
Creighton Offline
Member
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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