<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Hi Chris,</div><div dir="ltr"><br></div><div dir="ltr">Can\u2019t you increase the size of the KO\u2019s?</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br><blockquote type="cite">On May 7, 2022, at 7:17 PM, Chris Sparadeo via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="auto">Jason,</div><div dir="auto"><br></div><div dir="auto">I think I agree with your interpretation of the wiring diagram. My hesitation is, with a 1-1/4\u201d KO for AC inputs, only choice seems to be a >24\u201d stub conduit for 2/0 conductores to a fused disconnect. Not a fun pipe to bend\u2026and extra BOS seems like a less than ideal solution. </div><div dir="auto"><br></div><div dir="auto">Is this your conclusion as well? </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Apr 17, 2022 at 10:38 PM Darryl Thayer via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">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) </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Apr 17, 2022 at 10:39 AM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto"><div>But this isn't a tap. It's a feeder conductor connected to an OCPD. </div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">Jason </div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Sun, Apr 17, 2022, 11:29 AM Darryl Thayer via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">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</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Apr 16, 2022 at 9:16 PM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto"><div>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. </div><div dir="auto"><br></div><div dir="auto">Jason</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Sat, Apr 16, 2022, 10:06 PM Chris Sparadeo via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto">Jason,</div><div dir="auto"><br></div><div dir="auto">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. </div><div dir="auto"><br></div><div dir="auto">What I\u2019m 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. </div><div dir="auto"><br></div><div dir="auto">-Chris </div><div dir="auto"><br></div><div>On Sat, Apr 16, 2022 at 5:35 PM Darryl Thayer via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">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</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 15, 2022 at 8:26 PM Jerry Shafer via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto">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.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 15, 2022, 5:44 PM Chris Sparadeo via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="auto">Hi Jason,</div><div dir="auto"><br></div><div dir="auto">You bring up a valid point\u2026.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? </div><div dir="auto"><br></div><div dir="auto">-Chris </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 15, 2022 at 4:01 PM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"></div><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">P.S. ICYMI, this inverter has a massive combined AC coupled and DC coupled capacity. They allow 15kWdc plus 19.2kWac!!! Impressive.<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><table border="0" cellpadding="0" cellspacing="0" style="font-family:"helvetica neue",helvetica,arial,sans-serif"><tbody style="font-family:"helvetica neue",helvetica,arial,sans-serif"><tr style="font-family:"helvetica neue",helvetica,arial,sans-serif"><td rowspan="2" style="font-family:"helvetica neue",helvetica,arial,sans-serif"></td><td rowspan="2" style="font-family:"helvetica neue",helvetica,arial,sans-serif"><table border="0" cellpadding="0" cellspacing="0" style="border-left-width:1px;border-left-style:solid;font-size:13px;padding-left:10px;font-family:"helvetica neue",helvetica,arial,sans-serif;border-left-color:rgb(237,237,237);color:rgb(85,85,85)"><tbody style="font-family:"helvetica neue",helvetica,arial,sans-serif"><tr style="font-family:"helvetica neue",helvetica,arial,sans-serif"><td colspan="1" style="font-family:"helvetica neue",helvetica,arial,sans-serif"><br></td></tr></tbody></table></td></tr></tbody></table><b><div style="text-align:center"><br></div></b></div></div></div></div></div></div></div></div><br></div><br><img width="0" height="0" alt="" style="display: flex;" src="https://mailtrack.io/trace/mail/31ac8f625942a121932def3608adf394012a79cd.png?u=1613865" data-unique-identifier=""></div><div dir="ltr"><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 15, 2022 at 10:59 AM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" rel="noreferrer noreferrer noreferrer" target="_blank">jason@floridasolardesigngroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)"><div dir="ltr"><div style="font-family:arial,helvetica,sans-serif"></div><div style="font-family:arial,helvetica,sans-serif">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. </div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif">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?</div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif">Jason Szumlanski</div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif"><br></div><div style="font-family:arial,helvetica,sans-serif"><br></div><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><b><div style="text-align:center"><br></div></b></div></div></div></div></div></div></div></div><img width="0" height="0" alt="" style="display: flex;" data-unique-identifier=""></div>
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</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div>Chris Sparadeo</div><div><br></div><div><br></div><div>C_802-369-4458</div><div>H_802-728-3059</div><div></div></div></div></div></div></div>
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