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<DIV style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif">Beware of breakers used as service disconnects. Most in the range suitable for a supply side connections for PV are really branch circuit rated with 10k AIC which is generally too low for the utility fault current they may be exposed to.<BR>If you can get a statement from the utility with available fault current at the install site you might sneak one in. If you don't want to go to this trouble, use the rating of the exiting main breaker as a minimum value. Usually 20-25k AIC.</DIV></DIV>
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<SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; FONT-WEIGHT: bold">From: </SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif"><A href="mailto:bteitelbaum@aeesolar.com">Brian Teitelbaum</A></SPAN><BR><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; FONT-WEIGHT: bold">Sent: </SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif">3/12/2014 17:32</SPAN><BR><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; FONT-WEIGHT: bold">To: </SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif"><A href="mailto:re-wrenches@lists.re-wrenches.org">RE-wrenches</A></SPAN><BR><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif; FONT-WEIGHT: bold">Subject: </SPAN><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: Calibri,sans-serif">Re: [RE-wrenches] AC Combiner with main breaker as system disconnect</SPAN><BR><BR></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d">One big omission, in the otherwise fine Soligent white paper, is that the 60A minimum disconnect has to be rated as “Service Equipment”. Generally this means a “Heavy-Duty” safety switch or Service-rated load center with Main breaker. <o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d">I don’t see why an AC breaker panel, with a Main breaker, couldn’t act as the PV system disconnect, as long as it’s Service-rated, a minimum of 60A, and the utility does not require an external-handle disconnect, lockable in the off position. Many utility companies still do.<o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d">Brian Teitelbaum<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d">AEE Solar<o:p></o:p></SPAN></P>
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<P class=MsoNormal><B><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Jason Szumlanski<BR><B>Sent:</B> Wednesday, March 12, 2014 2:14 PM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] AC Combiner with main breaker as system disconnect<o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'Verdana','sans-serif'">Don't utter the word tap. :)</SPAN><o:p></o:p></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'Verdana','sans-serif'">See:</SPAN><o:p></o:p></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'Verdana','sans-serif'"><A href="http://www.soligent.net/documents/HappyLandings_v3.pdf">http://www.soligent.net/documents/HappyLandings_v3.pdf</A></SPAN><o:p></o:p></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 'Verdana','sans-serif'">We usually specify a fusible disconnect for overcurrent protection when grouping the PV AC combiner with the main premises disconnect is not practical.<o:p></o:p></SPAN></P></DIV>
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<P style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Jason Szumlanski<o:p></o:p></SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'">Fafco Solar<o:p></o:p></SPAN></P></DIV>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana','sans-serif'"><IMG id=_x0000_i1025 border=0 src="https://wisestamp.appspot.com/pixview.gif?p=chrome&v=3.31.0&t=1394658190268&u=eb875d38140ce271" width=1 height=1><o:p></o:p></SPAN></P></DIV></DIV></DIV>
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<P class=MsoNormal>On Wed, Mar 12, 2014 at 1:31 PM, <<A href="mailto:kevin@renovusenergy.com" target=_blank>kevin@renovusenergy.com</A>> wrote:<o:p></o:p></P>
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<P class=MsoNormal><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 'Helvetica','sans-serif'">I am trying to determine whether an AC combiner panel (for multiple inverter outputs) with main breaker can be also used as the PV system disconnect? <BR><BR>This is for a line tap situation. I am accustomed to doing these systems with an AC combiner, and separate enclosure for a breaker style, line tap over current protection.<BR><BR>Any thoughts/comments would be appreciated. <BR><BR>Thanks,<BR><BR>Kevin<o:p></o:p></SPAN></P></DIV>
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