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--></style></head><body lang="EN-US" link="blue" vlink="purple"><div class="WordSection1"><p class="MsoNormal"><span style="color:#1f497d">William,</span></p><p class="MsoNormal"><span style="color:#1f497d"> </span></p><p class="MsoNormal">
<span style="color:#1f497d">You have 9 M190s each running at 800 mA according to spec sheet. That equals 7.2 A nominal output current. Plus you have 10 M250s (if you look at your drawing) each running at 1 A = 10 A. 7.2 A + 10 A = 17.2 A * 1.25 = 21.5 A min breaker size. So, you'll need to round your breaker to a 25 A or 30 A breaker in the sub. You don't have any problem in the sub panel but the meter main is going to be a problem if it is a 100 A meter/main.</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p><p class="MsoNormal"><span style="color:#1f497d">Your drawing and case study notes don't seem to correspond - you mention M215s in the case study and show M250s on the drawing. If you indeed have 10 M215s then you're at 10 * 0.9 A = 9 A. 7.2 A + 9 A = 16.2 A * 1.25 = 20.25 A min breaker size. This is where it gets tricky. My fellow engineer just pointed out NEC 220.5(B) which allows you to drop fractions of amperes less than 0.5. So, I think you'd be okay with a 20 A solar breaker in this case.</span></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span></p><p class="MsoNormal"><span style="color:#1f497d">Best, August</span></p><p class="MsoNormal"><span style="color:#1f497d"> </span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a> [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Wednesday, October 09, 2013 3:07 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] Point of connection question</span></p></div></div><p class="MsoNormal"> </p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Friends:</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">At the risk of asking a question that may have been asked and answered here in the past, I wish to pose a question about Point of Connection.</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Rather than outline the situation here I put it all on a web page. If any of you have a moment to review this, I would be most appreciative.</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""><a href="http://www.millersolar.com/MillerSolar/case_studies/POC/_POC_Question.html">http://www.millersolar.com/MillerSolar/case_studies/POC/_POC_Question.html</a></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">Thanks in advance,</span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif""> </span></p><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial","sans-serif"">William Miller</span></p>
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