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#193792 - 04/19/10 10:50 PM feeder sizing
watersparkfalls Offline

Registered: 03/08/05
Posts: 210
Loc: Washington...Not DC
how should I calculate generator feeders? I have a 17 KW generator 71 amps, 310.15 allows #4 for 100 amps, but does it allow #6 for 71 amps? Do I size according to 310.16 which is still #4?

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#193795 - 04/20/10 12:32 AM Re: feeder sizing [Re: watersparkfalls]
gfretwell Offline


Registered: 07/20/04
Posts: 9025
Loc: Estero,Fl,usa
You can only use 310.15(B)(6) if this is a main feeder for the entire dwelling, basically an extension of the service entrance from a disconnect. That is, by definition, a #4 minimum. In no case could you interpolate down to a #6.
Any other application has to use 310.16.
Greg Fretwell

#193802 - 04/20/10 09:46 AM Re: feeder sizing [Re: gfretwell]
watersparkfalls Offline

Registered: 03/08/05
Posts: 210
Loc: Washington...Not DC
thanks Gfretwell


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