If you don't want to combine strings at the array, then I would use a Square D HU361 for each string. It is a lot of hardware, but not too expensive and very straightforward for a lay person to shut off without risk.
Cheers, Mark ---- *Mark Westbrock* Field Manager & Employee-Owner NM EE98J Journeyman Electrician NABCEP Certified PV Installation Professional NABCEP Certified PV Technical Sales <http://positiveenergysolar.com/> Positive Energy, Inc. 510 S. Main St. Las Cruces, NM 88001 office: 575-524-2030 cell: 575-640-2432 [email protected] <[email protected]> www.positiveenergysolar.com <http://www.nabcep.org/installer-locator?state=NM> <http://www.nabcep.org/installer-locator?state=NM> <http://www.solarreviews.com/installers/positive-energy-solar/> <http://www.bcorporation.net/> On Mon, Oct 6, 2014 at 1:13 PM, All Solar, Inc. <[email protected]> wrote: > How about the Midnite Solar four pole disconnect? > Can't remember the model number but recently installed one on a two string > TL input circuit. They are made for disconnecting both positive and > negative. > > Jeremy Rodriguez, > President > > All Solar, Inc. > 1463 M > Penrose Colorado 81240 > 719-372-3808 office > 719-372-3804 fax > www.asolarelectric.com > > Sent by Jeremy's iPhone. Sorry for typos and shorthand! > > On Oct 6, 2014, at 12:40 PM, "William Miller" <[email protected]> > wrote: > > Wrenches: > > > > We are getting up to speed on using transformer-less inverters. I have > advocated long for the additional safety offered by these inverters but I > am realizing the trade-offs with the new technology: The implementation > gets more complicated with the requirement for PV wire, OCPD and > disconnecting means for plus and minus and plus providing Arc Flash rated > equipment. > > > > I am currently designing a system that will locate the PV about 400 feet > from the residence. The system will utilize 2 Solectria 5200 watt > inverters at the residence. I would like to provide disconnecting means > for the 4 strings at the array, in case of any needed service or > excavating. Preferably I’d like the disconnecting means to be deployable > by a lay person (i.e. the gardener). > > > > Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy. I > could install an Outback 8 circuit combiner with 8 touch-safe fuse > holders. The new combiners have had dead-fronts for a while now. The > gardener needs only to have a Philips screw driver to open this cover. Any > better ideas out there? > > > > Thanks, > > > > William > > > > > > <image002.jpg> > Lic 773985 > millersolar.com <http://www.millersolar.com/> > 805-438-5600 > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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