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<TITLE>Re: [RE-wrenches] Square D DC disconnects</TITLE>

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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>(Unless, of course, you are working with a transformerless inverter and an ungrounded array, in which case both the positive and negative conductors would need to be switched, since both are ungrounded.)<BR>

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On 1/10/10 9:10 AM, "Drake Chamberlin" <<a href="drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.org</a>> wrote:<BR>

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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>At 05:14 PM 1/9/2010, you wrote:<BR>

</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>I recently came across a revised technical bulletin from square D ( <a href="http://ecatalog.squared.com/pubs/Electrical%20Distribution/Safety%20Switches/Heavy%20Duty/3110DB0401.pdf">http://ecatalog.squared.com/pubs/Electrical%20Distribution/Safety%20Switches/Heavy%20Duty/3110DB0401.pdf</a> )......<BR>

</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We would need to use method "D" with the three pole. Method "C" would break the negative, leaving it ungrounded. <BR>

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<FONT COLOR="#0000FF">Drake Chamberlin<BR>

Athens Electric<BR>

OH License 44810<BR>

CO License 3773<BR>

NABCEP </FONT></SPAN><FONT COLOR="#0000FF"><FONT SIZE="2"><SPAN STYLE='font-size:10pt'>TM </SPAN></FONT><SPAN STYLE='font-size:11pt'>Certified PV Installer <BR>

Office - 740-448-7328<BR>

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