<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:p="urn:schemas-microsoft-com:office:powerpoint" xmlns:a="urn:schemas-microsoft-com:office:access" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s="uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs="urn:schemas-microsoft-com:rowset" xmlns:z="#RowsetSchema" xmlns:b="urn:schemas-microsoft-com:office:publisher" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet" xmlns:odc="urn:schemas-microsoft-com:office:odc" xmlns:oa="urn:schemas-microsoft-com:office:activation" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:q="http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc="http://microsoft.com/officenet/conferencing" xmlns:D="DAV:" xmlns:Repl="http://schemas.microsoft.com/repl/" xmlns:mt="http://schemas.microsoft.com/sharepoint/soap/meetings/" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ppda="http://www.passport.com/NameSpace.xsd" xmlns:ois="http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir="http://schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:dsp="http://schemas.microsoft.com/sharepoint/dsp" xmlns:udc="http://schemas.microsoft.com/data/udc" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sub="http://schemas.microsoft.com/sharepoint/soap/2002/1/alerts/" xmlns:ec="http://www.w3.org/2001/04/xmlenc#" xmlns:sp="http://schemas.microsoft.com/sharepoint/" xmlns:sps="http://schemas.microsoft.com/sharepoint/soap/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:udcs="http://schemas.microsoft.com/data/udc/soap" xmlns:udcxf="http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udcp2p="http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf="http://schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss="http://schemas.microsoft.com/office/2006/digsig-setup" xmlns:dssi="http://schemas.microsoft.com/office/2006/digsig" xmlns:mdssi="http://schemas.openxmlformats.org/package/2006/digital-signature" xmlns:mver="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns:mrels="http://schemas.openxmlformats.org/package/2006/relationships" xmlns:spwp="http://microsoft.com/sharepoint/webpartpages" xmlns:ex12t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:ex12m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:pptsl="http://schemas.microsoft.com/sharepoint/soap/SlideLibrary/" xmlns:spsl="http://microsoft.com/webservices/SharePointPortalServer/PublishedLinksService" xmlns:Z="urn:schemas-microsoft-com:" xmlns:st="" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"\0027Microsoft Sans Serif\0027";}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi Wrenchers,<o:p></o:p></p><p class=MsoNormal>When using a sub-panel for the sole purpose of combining the output of multiple single phase inverters does NEC 690.64 (B) (2) apply? I know that this topic has been discussed but I am still not clear.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The “Can we Land” Article pg 11 Diagram 2b shows that using a Subpanel eliminates the problem of exceeding the 120% rule illustrated in diagram 2a but it does not show the rating of the sub-panel. In the example it shows 3 Fronius 7500W single phase inverters landing in a sub-panel and then the 3-phase sub-panel grid connected to a 80A 3-phase breaker in a 400A main panel. What is the minimum Amp rating required for the 3-phase Sub-panel in diagram 2b? Do we only need to size it for the OCP for the combined outputs of the 3 inverters (80A) or do the three 50A two-pole breakers need to be considered? <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For easy reference here is a link to the article: <a href="http://www.spgsolar.com/wp-content/uploads/2010/05/SPGLeBlancYates.pdf">http://www.spgsolar.com/wp-content/uploads/2010/05/SPGLeBlancYates.pdf</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>All feedback is appreciated.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'>Al Frishman</span></i><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><br></span><span style='font-size:13.5pt;font-family:"\0027Microsoft Sans Serif\0027";color:#030100'>Aeon</span><span style='font-size:13.5pt;font-family:"\0027Microsoft Sans Serif\0027";color:#FF9700'>Solar</span><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'>(917) 699-6641 - cell</span></i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><br></span><i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'>(888) 460-2867</span></i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><br></span><i><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><a href="http://www.aeonsolar.com/"><span style='color:blue'>www.aeonsolar.com</span></a></span></i><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal align=center style='text-align:center'><i><span style='font-size:14.0pt'><o:p> </o:p></span></i></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>