ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
fuse rejectors
by gfretwell. 03/23/17 01:12 PM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
WEG CFW-11 Frequency Inverter
by jraef. 03/21/17 08:50 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,243 Are you busy
165,954 Re: Forum
160,481 Need opinion
Who's Online Now
1 registered members (gfretwell), 67 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#193792 - 04/20/10 01:50 AM feeder sizing  
watersparkfalls  Offline
Member
Joined: Mar 2005
Posts: 216
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?
Thanks,
H20


2017 / 2014 NEC & Related Books and Study Guides

#193795 - 04/20/10 03:32 AM Re: feeder sizing [Re: watersparkfalls]  
gfretwell  Online Content


Member
Joined: Jul 2004
Posts: 9,057
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 12:46 PM Re: feeder sizing [Re: gfretwell]  
watersparkfalls  Offline
Member
Joined: Mar 2005
Posts: 216
Washington...Not DC
thanks Gfretwell



Member Spotlight
sparky66wv
sparky66wv
West Virginia
Posts: 2,232
Joined: November 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 15 (0.003s) Memory: 0.7497 MB (Peak: 0.8745 MB) Zlib enabled. Server Time: 2017-03-23 20:14:00 UTC