<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:m="http://schemas.microsoft.com/office/2004/12/omml" 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:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","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.apple-style-span
{mso-style-name:apple-style-span;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:black;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@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><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>I would run a wire, I have seen metallic conduit used as ground come apart in buildings. At that point we know where the ground (or at least the connection goes….)<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>I doubt that it makes a difference whether it is single or 3 phase.<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>But there are lots of people on the list with more 3 phase experience than I have. <o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Later,<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Bob Ellison<o:p></o:p></span></font></p><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold'>From:</span></font></b><font size=2 face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:bold'>On Behalf Of </span></b>Allen Frishman<br><b><span style='font-weight:bold'>Sent:</span></b> Tuesday, December 06, 2011 3:30 AM<br><b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br><b><span style='font-weight:bold'>Subject:</span></b> [RE-wrenches] GEC and EGC Advice<o:p></o:p></span></font></p></div></div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Fellow Wrenchers,<o:p></o:p></span></font></p><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>I know this topic has come up before and I have a understanding but I am looking for best practices advice.<o:p></o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>When installing a 50KW or larger 3 phase 208V (WYE Service) Inverter on a roof do you run your Grounding Electrode Conductor in a separate conduit from the 3 hots, and the Equipment Grounding Conductor or do you run it all in the same conduit together.<o:p></o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>My thought is to run it all in the same conduit and utilize the metalic conduit as the Equipment Ground instead of running a actual conductor for the EGC.<o:p></o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p></div><div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>All feedback is appreciated.<o:p></o:p></span></font></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><font size=2 color=black face="Times New Roman"><span style='font-size:10.5pt;color:black;font-style:italic'>Al Frishman</span></font></i><font size=4 color=black><span style='font-size:13.5pt;color:black'><br></span></font><font size=4 color="#030100"><span style='font-size:13.5pt;color:#030100'>Aeon</span></font><font size=4 color="#ff9700"><span style='font-size:13.5pt;color:#FF9700'>Solar</span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><font size=2 color=black face="Times New Roman"><span style='font-size:10.5pt;color:black;font-style:italic'><a href="tel:%28917%29%20699-6641" target="_blank">(917) 699-6641</a> - cell</span></font></i><font size=2 color=black><span style='font-size:10.5pt;color:black'><br><i><span style='font-style:italic'><a href="tel:%28888%29%20460-2867" target="_blank">(888) 460-2867</a></span></i><br><i><span style='font-style:italic'><a href="http://www.aeonsolar.com/" target="_blank">www.aeonsolar.com</a></span></i></span></font><font color=black><span style='color:black'><o:p></o:p></span></font></p></div></div><p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p></div></div></body></html>