Thanks, Mr Brearley......i have looked into the Solar Bos disconncecting combiners and also the Blue Oak......both look very well designed and we look forward to using them when we have a project where it makes sense.....small and medium residential projects dont pencil out for us based on the price of these products....I encouraged both companies to come up with a smaller version which has a price more in line with the smaller sized systems...... Luckily the latest inverters from most manufacturers take care of this need with their included/integrated but seperated fused DC disconnects..... However seems to me that in the nearer future we need to be moving towards having disconnects located as close as possible to the array...... My dream combiner for all you manufacturers out there would be similar to the readywatt 3 or 4 circuit, fused, rail mountable, combiner with disconnect integrated........ I am still pondering how square D could have overlooked this important listing requirement......makes me wonder!?!?!?
-- Sunny Regards, Kirpal Khalsa NABCEP Certified Solar PV Installer Renewable Energy Systems www.oregonsolarworks.com 541-218-0201 m 541-592-3958 o On Mon, Jan 11, 2010 at 11:41 AM, David Brearley < david.brear...@solarprofessional.com> wrote: > (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 > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > >
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