Hi Chris, Can’t you increase the size of the KO’s?
Jay > On May 7, 2022, at 7:17 PM, Chris Sparadeo via RE-wrenches > <re-wrenches@lists.re-wrenches.org> wrote: > > > Jason, > > I think I agree with your interpretation of the wiring diagram. My hesitation > is, with a 1-1/4” KO for AC inputs, only choice seems to be a >24” stub > conduit for 2/0 conductores to a fused disconnect. Not a fun pipe to bend…and > extra BOS seems like a less than ideal solution. > > Is this your conclusion as well? > >> On Sun, Apr 17, 2022 at 10:38 PM Darryl Thayer via RE-wrenches >> <re-wrenches@lists.re-wrenches.org> wrote: >> Yes and no, I think this is a tap, "a tap shall be permitted anywhere along >> a feeder" ' as long as it is less than a 10-foot rule or 25-foot rule >> ending in a listed OCPD with a rating sufficient to handle the maximum >> overcurrent'. Service equipment residential is rated for fault currents of >> up to 10,000 amps withstand. Refer to 240.4.B and 240.21 (B) (1 & 2) >> >>> On Sun, Apr 17, 2022 at 10:39 AM Jason Szumlanski via RE-wrenches >>> <re-wrenches@lists.re-wrenches.org> wrote: >>> But this isn't a tap. It's a feeder conductor connected to an OCPD. >>> >>> I guess if you don't have a grid in or generator in or AC Coupled PV, you >>> could just call it an inverter output circuit and it could be sized >>> accordingly. But it would still need to be protected at it's source by an >>> appropriately rated OCPD. Don't get me wrong... I don't think there is a >>> real safety issue here, but I also don't see how the NEC allows the >>> conductor to be sized for anything less than 200A. >>> >>> Jason >>> >>> >>>> On Sun, Apr 17, 2022, 11:29 AM Darryl Thayer via RE-wrenches >>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>> The tap rule says you can reduce to 10% of the nominal size for 10 feet >>>> and protect at the downstream OCPD or 25% for 25 feet for solar with >>>> multiple sources see 705 >>>> >>>>> On Sat, Apr 16, 2022 at 9:16 PM Jason Szumlanski via RE-wrenches >>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>> That's what I'm thinking. You would need to use a 200A conductor to a >>>>> separate load out OCPD before downsizing the wire. I guess there are pros >>>>> and cons, but it seems this is geared toward whole house backup for 200A >>>>> services. I'm eager to get an opportunity to use it in that scenario. >>>>> >>>>> Jason >>>>> >>>>> >>>>> >>>>> >>>>>> On Sat, Apr 16, 2022, 10:06 PM Chris Sparadeo via RE-wrenches >>>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>>> Jason, >>>>>> >>>>>> Any additional OCPD downstream of the 200A load output breaker could >>>>>> allow for a smaller wire size to be used at these terminals. For >>>>>> example, load output conductors run to a 100A main breaker panel board. >>>>>> Obviously depending on circumstances, a #4 copper could fit the bill. >>>>>> >>>>>> What I’m not extremely excited about with the new design is that in an >>>>>> off-grid scenario with a generator and smart load, we would now need to >>>>>> integrate an AC disconnect for generator input (grid) and either a >>>>>> fused disconnect or loads panel for any smart load output. With the 12K >>>>>> unit, the integrated breakers help cut down on BOS and install time. >>>>>> >>>>>> -Chris >>>>>> >>>>>>> On Sat, Apr 16, 2022 at 5:35 PM Darryl Thayer via RE-wrenches >>>>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>>>> Hello, The overcurrent device is to protect the conductors. you can >>>>>>> put any size wire, but you must protect with the overcurrent device. >>>>>>> REmember in solar equipment; you may have more than one supply source. >>>>>>> The DC best example is solar modules connected in parallel, on >>>>>>> >>>>>>>> On Fri, Apr 15, 2022 at 8:26 PM Jerry Shafer via RE-wrenches >>>>>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>>>>> You must meet all expected source output potentials within the design >>>>>>>> and operating limits, as long as the distribution panel and connected >>>>>>>> wiring is rated for the max output of the protected source then you >>>>>>>> are good. A 200 ATS connected to a 10 kW genny does not require 2/0 as >>>>>>>> it will never meet that rating. Just remember its whatever the max >>>>>>>> output can be plus your margin. >>>>>>>> >>>>>>>>> On Fri, Apr 15, 2022, 5:44 PM Chris Sparadeo via RE-wrenches >>>>>>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>>>>>> Hi Jason, >>>>>>>>> >>>>>>>>> You bring up a valid point….in an off-grid scenario with the 15k do >>>>>>>>> you size the conductors to the continuous capacity, surge capacity or >>>>>>>>> the OCPD of the unit? >>>>>>>>> >>>>>>>>> -Chris >>>>>>>>> >>>>>>>>>> On Fri, Apr 15, 2022 at 4:01 PM Jason Szumlanski via RE-wrenches >>>>>>>>>> <re-wrenches@lists.re-wrenches.org> wrote: >>>>>>>>>> P.S. ICYMI, this inverter has a massive combined AC coupled and DC >>>>>>>>>> coupled capacity. They allow 15kWdc plus 19.2kWac!!! Impressive. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>>> On Fri, Apr 15, 2022 at 10:59 AM Jason Szumlanski >>>>>>>>>>> <ja...@floridasolardesigngroup.com> wrote: >>>>>>>>>>> I'm not following the wiring diagrams for this new inverter. It has >>>>>>>>>>> 200A pass-through capability with an integrated 200A load >>>>>>>>>>> disconnect. But then it says the wire gauge for the load out wiring >>>>>>>>>>> can be #4 to 2/0. >>>>>>>>>>> >>>>>>>>>>> In an off-grid scenario where there is no generator, the max >>>>>>>>>>> continuous output is 62.5A, so I assume 80A circuit protection >>>>>>>>>>> could be used with 80A rated wire (#4), but how is that circuit >>>>>>>>>>> protection implemented if the 200A breaker is integrated? Do you >>>>>>>>>>> have to run a short piece of 2/0 to an external 80A rated OCPD and >>>>>>>>>>> then step down to #4? >>>>>>>>>>> >>>>>>>>>>> Jason Szumlanski >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>> _______________________________________________ >>>>>> >>>>> _______________________________________________ >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> There are two list archives for searching. When one doesn't work, try the >>> other: >>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> > -- > Chris Sparadeo > > > C_802-369-4458 > H_802-728-3059 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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