(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.)
On 1/10/10 9:10 AM, "Drake Chamberlin" <drake.chamber...@redwoodalliance.org> wrote: > At 05:14 PM 1/9/2010, you wrote: >> I recently came across a revised technical bulletin from square D ( >> http://ecatalog.squared.com/pubs/Electrical%20Distribution/Safety%20Switches/ >> Heavy%20Duty/3110DB0401.pdf )...... > We would need to use method "D" with the three pole. Method "C" would break > the negative, leaving it ungrounded. > > > Drake Chamberlin > Athens Electric > OH License 44810 > CO License 3773 > NABCEP TM Certified PV Installer > Office - 740-448-7328 Mobile - 740-856-9648
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