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Old 01-08-2010, 05:13 PM   #16
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Quote:
Originally Posted by codeone View Post
It doesnt will get you a code section as soon as I can.
Ahhh...... no the way I read it.
There is an exception where the main feeder does not have to be larger than the service entrance, but any other feeder is fair game to this screwed up code section.
This is right in 310.15(B)(6)
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Old 01-08-2010, 05:32 PM   #17
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215.2(A)(3)
(3) Individual Dwelling Unit or Mobile Home Conductors.
Feeder conductors for individual dwelling units or
mobile homes need not be larger than service conductors.
Paragraph 310.15(B)(6) shall be permitted to be used for
conductor size.

Maybe I could be looking at this wrong .


In the 08 code they added the wordage at 310.15(B)(6)
"that supplies, either by branch circuits or by feeders, or both, all loads that are part of or associated with the dwelling unit. The feeder conductors
to a dwelling unit shall not be required to have an allowable
ampacity rating greater than their service-entrance conductors."


What do you think?
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Old 01-08-2010, 07:44 PM   #18
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Originally Posted by codeone View Post
...What do you think?...
Does not apply to a shed. Only the feeder conductors for the actual dwelling.

Makes no sense, either.

I'd install a large enough conduit for 100 Amp conductors, and then use smaller wires, such as #6 for now. Betcha he never would need anything larger.
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Old 01-08-2010, 07:56 PM   #19
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In the 08 code they added the wordage at 310.15(B)(6)
"that supplies, either by branch circuits or by feeders, or both, all loads that are part of or associated with the dwelling unit.
The feeder conductors

to a dwelling unit shall not be required to have an allowable
ampacity rating greater than their service-entrance conductors."

Are you sure? Think carefully. A shed at a dwelling unit is a load associated with a dwelling unit.
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Old 01-08-2010, 09:18 PM   #20
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Quote:
Originally Posted by Speedy Petey View Post
Ahhh...... no the way I read it.
There is an exception where the main feeder does not have to be larger than the service entrance, but any other feeder is fair game to this screwed up code section.
This is right in 310.15(B)(6)
I agree this section is messed up. And I think you are right its just written bad. shouldnt be the disscussion on this forum anyway.
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Old 01-08-2010, 11:31 PM   #21
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Quote:
Originally Posted by codeone View Post
In the 08 code they added the wordage at 310.15(B)(6)
"that supplies, either by branch circuits or by feeders, or both, all loads that are part of or associated with the dwelling unit.
The feeder conductors

to a dwelling unit shall not be required to have an allowable
ampacity rating greater than their service-entrance conductors."

Are you sure? Think carefully. A shed at a dwelling unit is a load associated with a dwelling unit.
What you have in red is what the panelboard supplied by the 'main' power feeder supports. The main power feeder from the service equipment to a panelboard at the dwelling from which all branch circuits to the dwelling and feeders to sheds and that sort of wiring is terminated. These are subject to the ampacities of table 310.15(B)(6). A feeder from that panelboard to a shed is not a 'main' power feeder'. It is therefore subject to table 310.16. This particular part of 310.15(B)(6) is directed primarily at multifamily dwellings where main power feeders serve the units from single grouped main disconnects supplied by service entrance conductors. But it would also be the same for a mobile home. You have service equipment out at a pedestal and a 'main 4 wire feeder' serving a panelboard in the mobile home from which all the 'associated loads' of the mobile home are served. If the pedestal has provisions for sub-feeds then the conductors are sized to table 310.16 as they would not be a 'main power feeder' to a dwelling of any kind.
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Old 01-09-2010, 07:21 PM   #22
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very good !
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