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feeder sizing
#193792 04/20/10 01:50 AM
Joined: Mar 2005
Posts: 240
Washington...Not DC
watersparkfalls Offline OP
Member
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?
Thanks,
H20
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Re: feeder sizing
watersparkfalls #193795 04/20/10 03:32 AM
Joined: Jul 2004
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Estero,Fl,usa
G
gfretwell Offline
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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
Re: feeder sizing
gfretwell #193802 04/20/10 12:46 PM
Joined: Mar 2005
Posts: 240
Washington...Not DC
watersparkfalls Offline OP
Member
thanks Gfretwell

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