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I just sort of hit this in a previous post: <div>check 690.47C(3). Your system falls under (C) AC & DC grounding requirements.....</div><div>This just shouldn't be that hard with the inspectors....</div><div><br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div>Solarray.com<span class="Apple-tab-span" style="white-space:pre"></span></div><div>NABCEP # 04170442<span class="Apple-tab-span" style="white-space:pre"><span class="Apple-style-span" style="white-space: pre; "> </span></span></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br><div><div>On Jun 19, 2009, at 10:55 AM, Peter Parrish wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div class="Section1"><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">I have a LA Dept. of B&S inspector cite Article 690.47(B) “Direct-Current Systems” and its consequent grounding requirements (250.166(A)(B)) in connection with a very straightforward grid tied PV system (i.e. no batteries, just PV and a Xantrex GT inverter).</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">He said that since there is a DC circuit as well as an AC circuit, 690.47(B) applies. I countered that all PV systems have a DC circuit, so to separately call out a “Direct-Current System” must apply to something other than the DC PV circuit inherent in all PV systems.</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Am I missing something here? Is “Direct-Current System” defined in Article 690? We are working off NEC 2008.</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Thanks in advance for your help.</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div> <div><p class="MsoNormal" style="margin-left:.5in;text-indent:-.25in"><font size="2" face="Times New Roman"><span style="font-size:10.0pt">-<font size="1" face="Times New Roman"><span style="font:7.0pt "Times New Roman""> </span></font></span></font><font size="2" face="Arial"><span style="font-size: 10.0pt;font-family:Arial">Peter</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><span><image003.gif></span><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial; color:navy">Peter T. Parrish, Ph.D., President<br> California Solar Engineering, Inc.<br> 820 Cynthia Ave., Los Angeles, CA 90065<br> CA Lic. 854779, NABCEP Cert. 031806-26<br> <a href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a> <br> Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 </span></font><font size="1" color="navy"><span style="font-size:9.0pt;color:navy"> </span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div> <div><div><font size="3" face="Times New Roman"><span style="font-size: 12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> </div> </div> <span><image003.gif></span><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List sponsored by Home Power magazine</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Options & settings:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><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></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">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></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">List rules & etiquette:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">www.re-wrenches.org/etiquette.htm</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Check out participant bios:</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">www.members.re-wrenches.org</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> </blockquote></div><br></div></body></html>