Home Page link

Main Panel and Sub Panel questions and the NEC

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Page 2 of 2       << first < 1 2 Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Main Panel and Sub Panel questions and the NEC Guy Noir 03-31-2008
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by on March 31, 2008, 5:57 pm
On Mon, 31 Mar 2008 10:48:28 -0700 (PDT), Guy Noir

>Hi all. I need help understanding some parts of the NEC as they
>pertain to my sevice feed and sub panels.
>
>I had my service loop replaced recently from an old 60 amp service
>that fed 2 55 amp sub panels directly from a fused disconnect at the
>meter.
>
>The new service loop is 200 amps. The existing feed lines, etc to the
>subpanels were kept in place and fed via 55 amp breakers, removing the
>old fused disconnect.
>
>The electrician installed a 200 amp breaker panel with main lugs only
>(No main breaker). He said something about "As long as there are not
>any 100 amp feeds to subpanels, a main breaker is not required".
>
>The electrical inspector passed the install with no problems.
>
>Is this correct?
>
>Also, on my subpanels, there is no "Main" breaker either. They are old
>screw-buss fuse panels with lugs only. If I replace them, are they
>REQUIRED to have a Main Breaker on the sub-panel?
>
>I have a copy of the NEC, but I'm a little lost on these details.
>
>THANKS!
>-A


Your 200a panel is not a lighting and appliance panel since the branch
circuits do not originate there. You are limited to 6 disconnects in
there. It could be for feeders to your fuse panels or you could add a
couple big loads directly to the panel. Just remember total needs to
be six or less. As long as your sub-panels are individually protected
at the feed end they don't need a "main" in the panel.

Posted by Guy Noir on March 31, 2008, 5:05 pm
On Mar 31, 4:57=A0pm, gfretw...@aol.com wrote:
> On Mon, 31 Mar 2008 10:48:28 -0700 (PDT), Guy Noir
>
>
>
>
>
> >Hi all. I need help understanding some parts of the NEC as they
> >pertain to my sevice feed and sub panels.
>
> >I had my service loop replaced recently from an old 60 amp service
> >that fed 2 55 amp sub panels directly from a fused disconnect at the
> >meter.
>
> >The new service loop is 200 amps. The existing feed lines, etc to the
> >subpanels were kept in place and fed via 55 amp breakers, removing the
> >old fused disconnect.
>
> >The electrician installed a 200 amp breaker panel with main lugs only
> >(No main breaker). He said something about "As long as there are not
> >any 100 amp feeds to subpanels, a main breaker is not required".
>
> >The electrical inspector passed the install with no problems.
>
> >Is this correct?
>
> >Also, on my subpanels, there is no "Main" breaker either. They are old
> >screw-buss fuse panels with lugs only. If I replace them, are they
> >REQUIRED to have a Main Breaker on the sub-panel?
>
> >I have a copy of the NEC, but I'm a little lost on these details.
>
> >THANKS!
> >-A
>
> Your 200a panel is not a lighting and appliance panel since the branch
> circuits do not originate there. You are limited to 6 disconnects in
> there. It could be for feeders to your fuse panels or you could add a
> couple big loads directly to the panel. Just remember total needs to
> be six or less. As long as your sub-panels are individually protected
> at the feed end they don't need a "main" in the panel.- Hide quoted text -=

>
> - Show quoted text -

Thanks for the info. That was very helpful! I hooked my Central Air/
Electric furnace direct to the 200A panel as well as my feeders to the
subs. I'll make sure to keep it at or under 6!

Page 2 of 2       << first < 1 2
Similar ThreadsPosted
Re: Main Panel and Sub Panel questions and the NEC March 31, 2008, 2:34 pm
Main panel to main panel wiring in converting multi-family to single family dwelling November 9, 2006, 6:35 pm
New Main Panel Help April 11, 2008, 2:04 pm
Main Panel July 10, 2008, 11:30 pm
200 amp main panel with 100 amp breaker May 27, 2008, 8:39 am
Main Panel alive with breakers off? August 5, 2005, 4:30 pm
Grounding conductor to sub panel from main panel & "main grounding conductor" September 15, 2008, 1:18 pm
Re: Grounding conductor to sub panel from main panel & "main grounding conductor" September 15, 2008, 4:12 pm
Seeking Advice - New Main Breaker & Sub-Panel January 7, 2006, 9:01 am
Main Disconnect needed for electrical panel? September 7, 2007, 8:59 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap