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<DIV><FONT size=2 face=Arial>Yes, Jay, this is a TenKSolar system
-- they certainly do have a habit of taking the 'thinking outside the
box' approach!</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>The microinverter manufacturer states in their
installation manual, "Connect the grounding electrode conductor to the
microinverter ground clamp" so it's quite clear we are dealing with GEC
rules.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Thanks for all your comments and the reminder of
the NEC 250.166(C) exception which I hadn't really connected with before.
</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I'm having difficulty understanding what the
requirement in that paragraph actually means. When it states "that portion of
the grounding electrode conductor that is the sole connection to the grounding
electrode shall not be required to be larger than 6AWG..." -- what does "that
portion" and "sole connection" mean? If we have a number of GEC branches from
that are irreversably spliced to a single 6AWG conductor bonded to the
grounding electrode, do those various GECs affect the "that portion" and "sole
connection" at all?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Charlie Pickard<BR>NABCEP Certified PV Installation
Professional ™<BR>Aladdin Solar, LLC</FONT></DIV>
<DIV><FONT size=2 face=Arial> </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=billbrooks7@yahoo.com href="mailto:billbrooks7@yahoo.com">Bill
Brooks</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">'RE-wrenches'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, September 18, 2013 2:42
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] GEC sizing for
a high amp,low voltage PV system with microinverters</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Nick,<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Thanks
for the clarification—it is a mysterious threaded hole….<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Bill.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt">From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt"> <A
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</A>
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Nick
Soleil<BR><B>Sent:</B> Wednesday, September 18, 2013 10:19 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] GEC sizing for a high amp,
low voltage PV system with microinverters<o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<DIV>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal>Hi Bill and
wrenches,<o:p></o:p></P></DIV>
<P class=MsoNormal>To clarify, our new Enphase M250 microinverter does not
have a grounding terminal. The grounding of the M250 will be provided
through the Engage cable. We only have a hole in the lid, in the rare
case that a lug will be desired or required by the AHJ, but we do not provide
the grounding clip with the microinverter. A grounding terminal can be
added to the microinverter. We have an application note on alternate
grounding methods for the M250, if needed.<o:p></o:p></P></DIV>
<DIV>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal><o:p> </o:p></P></DIV><PRE><o:p> </o:p></PRE></DIV><BR><BR>__________ Information from ESET
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