<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">The code does require the GEC to be continuous (250.64C), and I believe that the AC EGC for the Enphase metal inverter cases is in fact the same as the DC GEC since the point of system bonding on the DC side is inside the inverter. <div>See art. 100 definitions:<b>Grounding Electrode Conductor. A conductor used to</b></div>
<p class="p1"><b>connect the system grounded conductor...</b><b>to a point on the grounding electrode</b></p>
<p class="p1"><b>system.</b></p><div><br>So this means that for Enphase systems the AC EGC (which is also the DC GEC) should be at minimum 8 awg (250.66) and continuous? Seems like it to me. </div><div><br><div>Rebekah Hren</div><div><br><div><br><br>--- On <b>Tue, 9/14/10, Mark Frye <i><markf@berkeleysolar.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Mark Frye <markf@berkeleysolar.com><br>Subject: Re: [RE-wrenches] GEC for Enphase inverters<br>To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org><br>Date: Tuesday, September 14, 2010, 10:05 AM<br><br><div id="yiv1974489623">
<div dir="ltr" align="left"><span class="yiv1974489623468365813-14092010"><font color="#0000ff" size="2" face="Arial">I believe the AC GEC runs from; the point where the ungrounded
current carrying conductor is bonded to the enclosure of the service enterance
equipment; to the connection to the ground electrode system. Conductors that run
from the service enterance equipment, thru the premis to the Enphase are bonding
jumpers that are not required to be continuous.</font></span></div>
<div dir="ltr" align="left"><span class="yiv1974489623468365813-14092010"><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div dir="ltr" align="left"><span lang="en-us"><font size="2" face="Arial">Mark
Frye</font></span> <br><span lang="en-us"><font size="2" face="Arial">Berkeley Solar
Electric Systems</font></span> <br><span lang="en-us"><font size="2" face="Arial">303
Redbud Way</font></span> <br><span lang="en-us"><font size="2" face="Arial">Nevada
City, CA 95959</font></span> <br><span lang="en-us"><font size="2" face="Arial">(530) 401-8024</font></span> <br><span lang="en-us"></span><a rel="nofollow" target="_blank" href="http://www.berkeleysolar.com/"><span lang="en-us"><u><font color="#0000ff" size="2" face="Arial">www.berkeleysolar.com</font></u></span></a><span lang="en-us"><font size="2" face="Arial"> </font></span> </div>
<div> </div><br>
<div dir="ltr" lang="en-us" class="yiv1974489623OutlookMessageHeader" align="left">
<hr tabindex="-1">
<font size="2" face="Tahoma"><b>From:</b> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>William
Miller<br><b>Sent:</b> Monday, September 13, 2010 9:46 PM<br><b>To:</b>
RE-wrenches<br><b>Subject:</b> [RE-wrenches] GEC for Enphase
inverters<br></font><br></div>
<div></div>Friends:<br><br>According to the 2005 NEC 250.64(C), the GEC for an
AC system needs to be continuous without splices unless they are
irreversible. I am not clear where this conductor starts and ends.
Is it from the ground buss in a sub-panel to the disconnect switch on the roof,
or to each inverter?<br><br>Also, non-reversible splices need to be listed for
use in grounding systems. Any suggestions on make and model of splices so
listed?<br><br>Any advise from those more experienced is much
appreciated.<br><br>William Miller<br><br>
<p><font size="3"><u>Please note new e-mail address and
domain:<br><br></u>William Miller <br>Miller Solar<br>Voice
:805-438-5600<br>email: william@millersolar.com<br><a rel="nofollow" target="_blank" href="http://millersolar.com/">http://millersolar.com<br></a>License No.
C-10-773985<br></font></p>
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