I like the idea for larger systems, someone tell Sq. D to make a 4 blade 600 volt disconnect. I would like to see it disconnect the "fuse grounded" conductor also. and then it could be a combiner and load rated disconnect. darryl
--- On Tue, 9/22/09, Chris Anderson <cander...@borregosolar.com> wrote: > From: Chris Anderson <cander...@borregosolar.com> > Subject: Re: [RE-wrenches] Rooftop DC disconnects > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Tuesday, September 22, 2009, 10:55 AM > I am pretty sure it is in the draft > of the 2011 code. While we are not governed yet by the 2011 > code, I think it is good practice and is something we should > all do sooner than later. Borrego is moving that direction > as we speak. No reason to wait around for the code to tell > us what we have to do. I would recommend getting an > integrated load break combiner - there are several on the > market already - and breaking the output circuits from the > combiner immediately so that conduits running on the roof > and through the building can be de-energized in the event of > a fire. > > -Chris Anderson > Chief Technology Officer > Resources Group > C: 603-732-2411 > Borrego Solar Systems > > > -----Original Message----- > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] > On Behalf Of Troy Harvey > Sent: Tuesday, September 22, 2009 11:43 AM > To: RE-wrenches > Subject: [RE-wrenches] Rooftop DC disconnects > > I am being told we need rooftop DC disconnects for a 6 > string > commercial solar install, instead of DC disconnects in the > mech room. > I don't see anything about this in the NEC. Any truth to > this? > > > thanks > > Troy Harvey > --------------------- > Heliocentric > 801-453-9434 > tahar...@heliocentric.org > > _______________________________________________ > 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 > > _______________________________________________ > 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 > > _______________________________________________ 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
