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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Allan,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You are leaving out the most important update in the code
relative to the Enphase inverter. The issue is covered in 690.14(D),</span><span
style='font-size:24.0pt;font-family:"Trebuchet MS","sans-serif";color:#284C6A'>
</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Utility-Interactive Inverters Mounted in Not-Readily Accessible
Locations. <o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo1'><![if !supportLists]><span
style='font-size:11.0pt;color:#1F497D'><span style='mso-list:Ignore'>•<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Utility-interactive inverters shall be permitted to be mounted
on roofs or other exterior areas that are not readily accessible. These
installations shall comply with (1) through (4):<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo1'><![if !supportLists]><span
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</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(1) A direct-current photovoltaic disconnecting means shall be
mounted within sight of or in the inverter.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo1'><![if !supportLists]><span
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</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(2) An alternating-current disconnecting means shall be mounted
within sight of or in the inverter.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo1'><![if !supportLists]><span
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</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(3) The alternating-current output conductors from the inverter
and an additional alternating-current disconnecting means for the inverter
shall comply with 690.14(C)(1).<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:1.0in;text-indent:-.25in;mso-list:l1 level2 lfo1'><![if !supportLists]><span
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</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(4) A plaque shall be installed in accordance with 705.10.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The connectors can be used as the required disconnects based on
690.33(E)<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(E) Interruption of Circuit. </span></b><span style='font-size:
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Connectors shall be
either (1) or (2):<o:p></o:p></span></p>
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style='font-size:11.0pt;color:#1F497D'><span style='mso-list:Ignore'>•<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(1) Be rated for interrupting current without hazard to the
operator. <o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='font-size:11.0pt;color:#1F497D'><span style='mso-list:Ignore'>•<span
style='font:7.0pt "Times New Roman"'>
</span></span></span><![endif]><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(2) Be a type that requires the use of a tool to open and marked
“Do Not Disconnect Under Load” or “Not for Current Interrupting.”<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Item 2 is the only way to comply since no connectors at the
moment have been evaluated for interrupting current.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Bill.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><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>On Behalf Of </b>Allan
Sindelar<br>
<b>Sent:</b> Thursday, August 14, 2008 8:41 PM<br>
<b>To:</b> 'RE-wrenches'<br>
<b>Subject:</b> [RE-wrenches] Enphase inverters<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>Wrenches, here's a followup
question and answer about the new Enphase inverters:</span> <o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>----- Original Message -----<br>
From: "Allan Sindelar" <allan@positiveenergysolar.com><br>
To: "Scott King" <sking@enphaseenergy.com><br>
Subject: RE: Enphase Energy - Further Info</span> <br>
<span style='font-family:"Arial","sans-serif"'>Scott, </span><br>
<span style='font-family:"Arial","sans-serif"'>Thank you for your clear
answers, which I today forwarded to the Wrenches list. </span><br>
<span style='font-family:"Arial","sans-serif"'>One additional area of concern I
have, please: Is the Enphase listed as an AC module inverter, or is it listed
as just a grid-tie inverter? My understanding of the UL standard is that an AC
module inverter must be integrated with the PV array as an assembly – i.e. sold
pre-mounted to the PV module – and that this is why no DC disconnect is
required for it since there is no field wiring of the DC circuits. </span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>From what I have seen on the
Enphase datasheets and manuals, the type of listing it has is not discussed.
Since you are selling it as a separate unit from the PV array it would seem
that it is just listed as a grid-tie inverter and therefore would require an
accessibly DC disconnect for each inverter (ugh). This seems like a major issue
if they are actually only listed as a grid-tie inverter. Can you clarify? </span><o:p></o:p></p>
<p><span style='font-family:"Arial","sans-serif"'>Thanks, Allan</span> <o:p></o:p></p>
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