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#101047 - 02/05/07 03:18 PM Table 310.15(B)(6)
Tom Offline
Member

Registered: 01/01/01
Posts: 1069
Loc: 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?
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#101048 - 02/05/07 03:28 PM Re: Table 310.15(B)(6)
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
No, it is only for the main feeder to the dwelling.
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#101049 - 02/05/07 03:41 PM Re: Table 310.15(B)(6)
iwire Offline
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Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
The detached shop is not a dwelling unit so that table can not be used.
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#101050 - 02/05/07 03:57 PM Re: Table 310.15(B)(6)
Roger Offline
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Registered: 05/18/02
Posts: 1779
Loc: N.C.
Another no here.

Roger

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#101051 - 02/05/07 05:53 PM Re: Table 310.15(B)(6)
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: 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.

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#101052 - 02/05/07 06:55 PM Re: Table 310.15(B)(6)
Steve T Offline
Member

Registered: 02/14/01
Posts: 312
Loc: Oak Park, IL, USA
That's kinda dumb ain't it?

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#101053 - 02/05/07 06:56 PM Re: Table 310.15(B)(6)
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: 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.
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#101054 - 02/05/07 08:35 PM Re: Table 310.15(B)(6)
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: Rahway, New Jersey
A main feeder, and all other feeders within the same dwelling, shall comply with Table 310.15(B)(6).

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#101055 - 02/05/07 08:46 PM Re: Table 310.15(B)(6)
caselec Offline
Member

Registered: 04/14/02
Posts: 557
Loc: 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
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#101056 - 02/05/07 11:57 PM Re: Table 310.15(B)(6)
stamcon Offline
Member

Registered: 03/24/01
Posts: 322
Loc: 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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