Somewhat unrelated is the confusion about AC branch circuit OCPD in an Enphase IQ system. My understanding was that each branch circuit could be protected by a 20A breaker, but I always designed it for minimum branch circuit OCPD at 1.25 x combined inverter output circuit rating. The Original IQ Combiner had 20A breakers preinstalled, so that was not an option. The IQ design guide states that for the Combiner+ and Combiner 3 that the installer should select breakers with the correct amp rating. The M series design guide stated that 1.25 x combined inverter output circuit rating should be used. But it seems that Enphase would approve of 20A circuit protection regardless of how the string is populated (up to the max).
Back to the original thread - I'm thinking that a grounding conductor should run with the circuit conductors and just terminate on a lug or ground bar even if it's all PVC. As for whether the DIN rail needs to be bonded - no idea on that one... I could argue that it is not exposed if it is behind the Envoy I suppose. Jason On Thu, Mar 28, 2019 at 4:29 PM Nick Soleil <[email protected]> wrote: > Hi Jason and Christopher, > > > We provide installation recommendations for installing an Envoy in a > separate enclosure on pages 12-16 of our IQ Planning Guide found here. > <https://enphase.com/sites/default/files/downloads/support/TechBrief-Planning-for-IQ-System.pdf#page=12> > This > tech brief doesn't address Jason's code questions, though. > > > Cordially, > > Nick Soleil > > Enphase Energy Senior Product Manager, Envoy and Accessories > > (707) 763-4784 x7267 // office > > (707) 321-2937 // cell > > *Powering What’s Next*™* | *The Enphase Energy Management System > <https://enphase.com/en-us/products-and-services/envoy> > > NABCEP Certified Solar PV Installer #03262011-300 > > California C10 Licensed Electrician #986315 > > > > ------------------------------ > *From:* RE-wrenches <[email protected]> on behalf > of Christopher Warfel <[email protected]> > *Sent:* Thursday, March 28, 2019 11:43 AM > *To:* [email protected] > *Subject:* Re: [RE-wrenches] Enphase Envoy in PVC J-Box > > *EXTERNAL EMAIL* - *Use caution when responding, clicking, and/or > downloading attachments.* > > > > > > If you are using the IQ Combiner, the wiring diagram is on the inside > cover. Coming from the array, L1, L2 and G. Going to the utility > interconnection, L1, L2, G, N. L1, L2 into the 20a breakers, G to the G > busbar, N to the N busbar. It's all there and is a nice package I think. > My personal preference is to use manufacturer's equipment instead of making > my own. I don't know if the AHJ would complain about non-listed equipment > in the case of making your own DAS center. The Envoy may need a button > pushed once in a while. I have asked customers to do this to save a trip. > The Enphase "package" is safe for them to do that. I hope I did not miss > your question. Chris > On 3/28/2019 12:55 PM, Jason Szumlanski wrote: > > When mounting an Envoy on the supplied DIN rail in a PVC box wired via PVC > conduit, is there any requirement to accompany the conductors with a ground > wire? The envoy itself does not have a ground connection and the only > exposed metallic part is the DIN rail. > > I'm thinking I need to mount a ground lug in the PVC box so the circuit > conductors have a ground wire in the conduit. I have always used the IQ > combiner even for larger systems because it was just easier. I'm > considering changing to a regular PVC junction box with just an Envoy. > > While on the subject, if there is ample space within a load center, would > it be permissible to mount the Envoy right inside the enclosure? 400A plus > load centers in residential settings often have a lot of empty space! > > > > _______________________________________________ > 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 > <https://mailtrack.io/trace/link/da2ef7faff3c518f059fdaeefe6907a68f9fcecc?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=8c5d3391ec9d7709> > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > <https://mailtrack.io/trace/link/04f3de9e4ef330e8f56e489c838a8863dacf98a0?url=http%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmaillist.html&userId=1613865&signature=5d79297ceef0bd7e> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > <https://mailtrack.io/trace/link/d332f5e5bc1e256027263e3ec690d30fbde3c530?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=c62b7ec303c18366> > > Check out or update participant bios: > www.members.re-wrenches.org > <https://mailtrack.io/trace/link/d8e62b3094f64a5ffa1513ed1f3d3292df706d2a?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=1e1eb2c963a02894> > >
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