<html><head></head><body bgcolor="#FFFFFF"><div>I agree and read it the same way. Not a separately derived system. </div><div><br></div><div>Jesse <br><br>Sent from my iPhone</div><div><br>On Jan 23, 2012, at 7:13 PM, "Dave Palumbo" <<a href="mailto:dave@independentpowerllc.com">dave@independentpowerllc.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">Regarding NEC Article 250.30 does Informational Note #1 mean that a standard (no battery) grid-tied PV system is not a Separately Derived System?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">I’m primarily interested on the consensus view of Bonding the Neutral (grounded conductor) to Equipment Ground in a 60 Amp Fused Disconnect located between the 240VAC inverter output and AC point of connection on the load side of the meter in the service disconnect enclosure in a <u>supply side connected PV system</u>. <o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">250.30 Informational Note 1 reads: “<i>An alternate ac power source, such as an on-site generator, is <u>not</u> a separately derived system if the grounded conductor is solidly interconnected to a service-supplied system grounded conductor…” </i> I believe a PV system meets that description as the Neutral stays connected at all times. <i><o:p></o:p></i></p><p class="MsoNormal"><i><o:p> </o:p></i></p><p class="MsoNormal">My interpretation is that a standard net-metered PV system is therefore not a separately derived system and the Neutral should not have a bonding jumper to equipment ground in the Fused Disconnect.<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Is this the correct interpretation?<o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">David Palumbo<o:p></o:p></p><p class="MsoNormal">Independent Power LLC <o:p></o:p></p><p class="MsoNormal">462 Solar Way Drive<o:p></o:p></p><p class="MsoNormal">Hyde Park, VT 05655<b><o:p></o:p></b></p><p class="MsoNormal"><b><i><a href="http://www.independentpowerllc.com">www.independentpowerllc.com</a> <o:p></o:p></i></b></p><p class="MsoNormal">NABCEP Certified PV Installer<o:p></o:p></p><p class="MsoNormal">Vermont Solar Partner<o:p></o:p></p><p class="MsoNormal">24 Years Experience, (802) 888-7194 <o:p></o:p></p><p class="MsoNormal"><o:p> </o:p></p></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>List sponsored by Home Power magazine</span><br><span></span><br><span>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></span><br><span></span><br><span>Options & settings:</span><br><span><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a></span><br><span></span><br><span>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a></span><br><span></span><br><span>List rules & etiquette:</span><br><span><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a></span><br><span></span><br><span>Check out participant bios:</span><br><span><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a></span><br><span></span><br></div></blockquote></body></html>