Jeremy,
Good point. Even under the 2008 NEC 690.64(B)(2) you can install up to a 40 Amp breaker on the load side as long as it is on the opposite side of the input feed per 690.64(B)(7). Garrison, do you need a 60 A breaker? I haven't used this product myself, but if the continuous output power is indeed 4500 W then you'd be fine with a 25 or 30 A breaker. Best, August *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *All Solar, Inc. *Sent:* Wednesday, February 27, 2013 1:50 PM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] Conductor Sizing for Supply Side Connection There is an exception in NEC2011 regarding the point of connection. This may not apply, but you could avoid the supply side. 4500W / 240V = 18.75 x 1.25 = 23.4A, well under the 120% rule. reference 705.12(D)(2) Jeremy All Solar CO,USA ----- Original Message ----- *From:* Garrison Riegel <garri...@solarserviceinc.com> *To:* 'RE-wrenches' <re-wrenches@lists.re-wrenches.org> *Sent:* Wednesday, February 27, 2013 2:15 PM *Subject:* [RE-wrenches] Conductor Sizing for Supply Side Connection Wrenches, On an upcoming job we have a Xantrex XW4548 interconnecting with a 200A service, and I’d very much appreciate some advice if y’all are willing. Since the inverter output OCPD is required to be 60A we are looking at a supply side connection, and I have two questions: 1. Before the point of interconnection the inverter output circuit will first pass through the XW Power Distribution Panel and inverter bypass, which is essentially a 60A breaker. The service disconnect for the supply side connection will also be fused at 60A. Does the 120% rule apply to the conductor between these two OCPDs? Or since this is a supply side connection in accordance with 690.64(A), 690.64(B)(2) will not apply? [this AHJ is on the 2008 NEC] 2. Can anyone recommend a reliable insulation piercing tap connector? Or would you recommend something else entirely for a residential supply side connection? Thanks in advance, Garrison 847-677-0950 Solar Service Inc. ------------------------------ _______________________________________________ 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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