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#101047 - 02/05/07 07:18 PM Table 310.15(B)(6)  
Tom  Offline
Member
Joined: Jan 2001
Posts: 1,044
Shinnston, WV USA
I'm taking an informal poll here.

Should the table apply to a feeder run from a dwelling to a detached shop?


Few things are harder to put up with than the annoyance of a good example.

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#101048 - 02/05/07 07:28 PM Re: Table 310.15(B)(6)  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,080
Estero,Fl,usa
No, it is only for the main feeder to the dwelling.


Greg Fretwell

#101049 - 02/05/07 07:41 PM Re: Table 310.15(B)(6)  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
The detached shop is not a dwelling unit so that table can not be used.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#101050 - 02/05/07 07:57 PM Re: Table 310.15(B)(6)  
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
Another no here.

Roger


#101051 - 02/05/07 09:53 PM Re: Table 310.15(B)(6)  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
No, it is only good for the main feeder and to other panels within the same dwelling. Conductors feeding a detached "shop" must comply with 310.16. So it's ok to run #4 copper feeders to a subpanel on the 2nd floor of a dwelling for 100 amps, but if 100 amps is desired for a detached shop, #2 copper should be run.


#101052 - 02/05/07 10:55 PM Re: Table 310.15(B)(6)  
Steve T  Offline
Member
Joined: Feb 2001
Posts: 306
Oak Park, IL, USA
That's kinda dumb ain't it?


#101053 - 02/05/07 10:56 PM Re: Table 310.15(B)(6)  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,080
Estero,Fl,usa
Shock, a sub panel is not a "main feeder" unless that is the source of all current to a dwelling. For example, if you had a 100a disconnect at ther meter feeding a distribution panel that would be a main feeder. If you come to a main panel with other loads and then feed another sub, that is not a main feeder and you us 310.16.


Greg Fretwell

#101054 - 02/06/07 12:35 AM Re: Table 310.15(B)(6)  
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
A main feeder, and all other feeders within the same dwelling, shall comply with Table 310.15(B)(6).


#101055 - 02/06/07 12:46 AM Re: Table 310.15(B)(6)  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
Quote
A main feeder, and all other feeders within the same dwelling, shall comply with Table 310.15(B)(6).


Not sure where you are getting this from. 310.15(B)(6) can't be used for subpanels.

310.15(B) (6) 120/240-Volt, 3-Wire, Single-Phase Dwelling Services and Feeders For individual dwelling units of one family, two-family, and multifamily dwellings, conductors, as listed in Table 310.15(B)(6), shall be permitted as 120/240-volt, 3-wire, single-phase service-entrance conductors, service lateral conductors, and feeder conductors that serve as the main power feeder to each dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. For application of this section, the main power feeder shall be the feeder(s) between the main disconnect and the lighting and appliance branch-circuit panelboards(s). The feeder conductors to a dwelling unit shall not be required to have an allowable ampacity rating greater than their service-entrance conductors. The grounded conductor shall be permitted to be smaller than the ungrounded conductors, provided the requirements of 215.2, 220.61, and 230.42 are met.

Curt


Curt Swartz

#101056 - 02/06/07 03:57 AM Re: Table 310.15(B)(6)  
stamcon  Offline
Member
Joined: Mar 2001
Posts: 329
So San Francisco CA
Quote
For application of this section, the main power feeder shall be the feeder(s) between the main disconnect and the lighting and appliance branch-circuit panelboards(s).


Isn't any panel located downstrem of the main disconnect a "subpanel"? Or does the main disconnect have to be an overcurrent device, to have any panel downstream a "subpanel"?

steve


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