I think the heavy duty version stems from its 600V rating for AC or DC, and may not be necessary for 240V Service Equipment.
We always picked the heavy duty models, but I think that was primarily to use as DC discos. I don't see any reason why a general duty model could not be used in a 240VAC application as Service Equipment. -Glenn From: [email protected] [mailto:[email protected]] On Behalf Of Jason Szumlanski Sent: Wednesday, March 12, 2014 6:20 PM To: RE-wrenches Subject: Re: [RE-wrenches] AC Combiner with main breaker as system disconnect The D222NRB General Duty safety switch is service rated. Why do you say it has to be heavy-duty? Jason Szumlanski Fafco Solar <https://wisestamp.appspot.com/pixview.gif?p=chrome&v=3.31.0&t=1394662672015 &u=eb875d38140ce271> On Wed, Mar 12, 2014 at 5:32 PM, Brian Teitelbaum <[email protected]> wrote: One big omission, in the otherwise fine Soligent white paper, is that the 60A minimum disconnect has to be rated as "Service Equipment". Generally this means a "Heavy-Duty" safety switch or Service-rated load center with Main breaker. I don't see why an AC breaker panel, with a Main breaker, couldn't act as the PV system disconnect, as long as it's Service-rated, a minimum of 60A, and the utility does not require an external-handle disconnect, lockable in the off position. Many utility companies still do. Brian Teitelbaum AEE Solar From: [email protected] [mailto:[email protected]] On Behalf Of Jason Szumlanski Sent: Wednesday, March 12, 2014 2:14 PM To: RE-wrenches Subject: Re: [RE-wrenches] AC Combiner with main breaker as system disconnect Don't utter the word tap. :) See: http://www.soligent.net/documents/HappyLandings_v3.pdf We usually specify a fusible disconnect for overcurrent protection when grouping the PV AC combiner with the main premises disconnect is not practical. Jason Szumlanski Fafco Solar <https://wisestamp.appspot.com/pixview.gif?p=chrome&v=3.31.0&t=1394658190268 &u=eb875d38140ce271> On Wed, Mar 12, 2014 at 1:31 PM, <[email protected]> wrote: I am trying to determine whether an AC combiner panel (for multiple inverter outputs) with main breaker can be also used as the PV system disconnect? This is for a line tap situation. I am accustomed to doing these systems with an AC combiner, and separate enclosure for a breaker style, line tap over current protection. Any thoughts/comments would be appreciated. Thanks, Kevin _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & 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: [email protected] Change email address & 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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