Re: [RE-wrenches] Conductor Sizing for Supply Side Connection

[Roy Butler]

Garrison and Ross, Although there are times that the buss bar rating may be higher than the main breaker rating, the difficulty is in obtaining documentation to verify that. Sometimes it states the rating clearly on the panel label but that seems to be the exception, not the rule.   Roy Butler NABCEP Certified Small Wind Installer® NABCEP Certified Solar PV Installer® NYSERDA eligible PV & wind installer Four Winds Renewable Energy, LLC 8902 Route 46, Arkport, NY 14807 607-324-9747 www.four-winds-energy.com Join us at the 9th Annual Small Wind Conference A Gathering of Installers, Manufacturers, Dealers, & Distributors June 18 and 19, 2013 in Stevens Point, Wisconsin www.smallwindconference.com Although no trees were killed in the sending of this message, a large number of electrons were terribly inconvenienced. On 3/1/2013 11:54 AM, Garrison Reigel wrote: Good point Ross.  The panel is marked as a 200A with no indication that the bus has a higher rating, so I've assumed 200A.  I considered downsizing the MB, but it's an discontinued panel, and filled to capacity so not exactly ideal. Thanks, Garrison From: re-wrenches-boun...@lists.re-wrenches.org [re-wrenches-boun...@lists.re-wrenches.org] on behalf of Ross Taylor [wind.trai...@gmail.com] Sent: Thursday, February 28, 2013 9:24 PM To: re-wrenches@lists.re-wrenches.org Subject: Re: [RE-wrenches] Conductor Sizing for Supply Side Connection Hi Garrison, This is a great discussion and I think I've read all the responses. If I missed this question, please forgive me.  But, in your original post you refer to a 200 amp service.  I don't, though, see mention of the rating of the bus bars.  The bus bars may be rated for something more than 200 amps, depending upon the panel, even if they're protected by a 200 amp main disconnect.  If so, that would increase your backfeed breaker sizing options. Best wishes,  Ross Taylor _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org

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