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<DIV><FONT size=2 face=Arial>Thanks Brian. That helps.</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> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=brian@solarenergy.org href="mailto:brian@solarenergy.org">Brian
Mehalic</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cpickard@aladdinsolar.com
href="mailto:cpickard@aladdinsolar.com">Aladdin Solar</A> ; <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 4:17
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 dir=ltr>
<DIV>Sole connection indicates that a GEC is connected to only one type of
grounding electrode. This term is easily mis- understood. For example, a GEC
can be connected to more than one grounding electrode—say, two ground rods—and
still be considered to have a sole connection. Similarly, multiple GECs
connected to the same grounding electrode are each considered to have a sole
connection. When GECs have a sole connection, their maximum size is limited
per NEC Sections 250.66 for an ac system and 250.166 for a dc system.
The 2014 NEC adds some clarification on this.</DIV>
<DIV><BR></DIV>
<DIV class=gmail_extra>
<DIV>
<DIV dir=ltr>
<DIV>Brian Mehalic <BR>NABCEP Certified Solar PV Installation
Professional™ R031508-59
<DIV>IREC ISPQ Certified Affiliated Instructor/PV US-0132<BR>
<DIV><BR></DIV>
<DIV>PV Curriculum Developer and Instructor
<DIV>Solar Energy International<BR><A href="http://www.solarenergy.org"
target=_blank>http://www.solarenergy.org</A></DIV></DIV></DIV></DIV></DIV></DIV><BR><BR>
<DIV class=gmail_quote>On Wed, Sep 18, 2013 at 4:52 PM, Aladdin Solar <SPAN
dir=ltr><<A href="mailto:cpickard@aladdinsolar.com"
target=_blank>cpickard@aladdinsolar.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote><U></U>
<DIV lang=EN-US vlink="purple" bgcolor="#ffffff" link="blue">
<DIV><FONT 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 face=Arial></FONT> </DIV>
<DIV><FONT 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 face=Arial></FONT> </DIV>
<DIV><FONT 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 face=Arial></FONT> </DIV>
<DIV><FONT 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 class=im>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Charlie Pickard<BR>NABCEP Certified PV Installation
Professional ™<BR>Aladdin Solar, LLC</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial></FONT> </DIV></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV>
<DIV class=h5>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A
title=billbrooks7@yahoo.com href="mailto:billbrooks7@yahoo.com"
target=_blank>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"
target=_blank>'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>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Nick,<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><U></U><U></U></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….<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">Bill.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"><U></U><U></U></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"
target=_blank>re-wrenches-bounces@lists.re-wrenches.org</A> [mailto:<A
href="mailto:re-wrenches-bounces@lists.re-wrenches.org"
target=_blank>re-wrenches-bounces@lists.re-wrenches.org</A>] <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<U></U><U></U></SPAN></P>
<P class=MsoNormal><U></U><U></U> </P>
<DIV>
<DIV>
<P style="MARGIN-BOTTOM: 12pt" class=MsoNormal>Hi Bill and
wrenches,<U></U><U></U></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.<U></U><U></U></P></DIV>
<DIV>
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class=MsoNormal><U></U><U></U> </P></DIV><PRE><U></U> <U></U></PRE></DIV><BR><BR></DIV></DIV>__________
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