[RE-wrenches] minimum service

[Matt Lafferty]

The NEC and local utility requirements don't always agree. 

It is fairly common for the utility to require a minimum 100A service to
single-family, duplex, and triplex residences these days. At four-plex, they
require a house meter with safety bypass and lower the individual unit
minimum to 60A.

Matt Lafferty

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Dave Click
Sent: Friday, August 27, 2010 5:10 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] minimum service

230.79(C):

230.79 Rating of Service Disconnecting Means.
The service disconnecting means shall have a rating not less than the
calculated load to be carried, determined in accordance with Part III, IV,
or V of Article 220, as applicable. In no case shall the rating be lower
than specified in 230.79(A), (B), (C), or (D).
(A) One-Circuit Installations. For installations to supply only limited
loads of a single branch circuit, the service disconnecting means shall have
a rating of not less than 15 amperes.
(B) Two-Circuit Installations. For installations consisting of not more than
two 2-wire branch circuits, the service disconnecting means shall have a
rating of not less than 30 amperes.
(C) One-Family Dwellings. For a one-family dwelling, the service
disconnecting means shall have a rating of not less than 100 amperes,
3-wire.
(D) All Others. For all other installations, the service disconnecting means
shall have a rating of not less than 60 amperes.

-------- Original Message --------
Subject: [RE-wrenches] minimum service
From: Marco Mangelsdorf <marco at pvthawaii.com>
To: 'RE-wrenches' <re-wrenches at lists.re-wrenches.org>
Date: 2010/8/27 01:41

> I believe that there's a section the code that states that a residence 
> shall have a minimum 100A service.
>
> Can anyone tell me where that is?
>
> Thanks,
>
> marco