UL 6703 was introduced in 2014 And in regards to mating connectors,
UL 6703. 1.5 This standard covers PV connectors whose dimensions are not defined in any national or international technical standard. Connectors are identified and tested with compatible mating part (or parts if multiple exist) and are to be of the same brand, unless multiple product manufacturers are submitting under the same evaluation for the purpose of proving intermatability. Maybe I’m not reading this correctly, I read it that both connector OEMs have to submit to have it meet the UL standard. jay > On Sep 7, 2019, at 5:54 AM, Jason Fisher (STC) <stc.ja...@gmail.com> wrote: > > Kent, I don’t see an answer to Brian’s question about the LG module’s > original connector configuration. We’re these modules actually factory > shipped with one H4 and one MC4 connector on different polarities? That would > be bizarre. > > Otherwise to back up Brian’s point about Intermatability, this is a UL 6703 > term that was added in NEC2020 to specifically address this question, how can > installers have confidence when they are asked to connect two different > manufacturer’s mating connectors. Bottom line is don’t connect “mismatched” > connectors, ever. Only connect different manufacturers, and/or different > models of mating connectors if at least one of the companies produces proof > of evaluation of that combination by an NRTL. Warning that this is rare at > this point (those wouldn’t therefore be “mismatched”). > > This is a very important issue so my advice to Wrenches is to keep firm and > don’t budge on this one. > > Also curious if you all still think you can’t cut off module connectors? We > need to correct that if so. > > Jason Fisher > From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on behalf of > Jerry Shafer <jerrysgarag...@gmail.com> > Sent: Thursday, September 5, 2019 11:25 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] connector mismatch > > Brian > Missing the point, yes they are compatible but as we have seen in the real > world there are issues. This can give module and micro inverter manufacturers > an out regarding failures and responsibility > Jerry > > On Thu, Sep 5, 2019, 1:41 AM Brian Mehalic <br...@solarenergy.org > <mailto:br...@solarenergy.org>> wrote: > I don’t think “some white paper” is sufficient based on Code requirements, UL > standards (6703), and verified field failures. Also see 2020 NEC® 690.33(C) - > now requiring intermatability. > > Brian > > On Sep 4, 2019, at 2:06 PM, Jerry Shafer <jerrysgarag...@gmail.com > <mailto:jerrysgarag...@gmail.com>> wrote: > >> Wrenches >> Per some white papers connectors are interchangeable, this being said l have >> had arc issues as a result. FYI there are knock-offs out there to. >> Jerry >> >> On Wed, Sep 4, 2019, 1:42 PM Brian Mehalic <br...@solarenergy.org >> <mailto:br...@solarenergy.org>> wrote: >> Are you saying each module has, for example, a positive factory H4 lead and >> a negative factory MC4 lead? >> >> I definitely know of H4 problems, both mated with H4s and mismatched. >> >> Brian Mehalic >> NABCEP Certified Solar PV Installation Professional™ R031508-59 >> National Electrical Code® CMP-4 Member >> (520) 204-6639 >> >> Solar Energy International >> http://www.solarenergy.org <http://www.solarenergy.org/> >> >> SEI Professional Services >> http://www.seisolarpros.com <http://www.seisolarpros.com/> >> >> >> >> On Wed, Sep 4, 2019 at 1:22 PM Kent Osterberg <k...@coveoregon.com >> <mailto:k...@coveoregon.com>> wrote: >> I've recently been looking for the cause of random power drop offs to >> zero in an Enphase M215 system with LG260 PV module that was installed >> in 2013. Just one inverter in a system of fourteen has been doing this. >> Enphase suggested moving the inverter to a different PV module and sure >> enough doing that proved the problem wasn't with the inverter. >> Intermittent zero output was being caused by the PV module. In making >> the inverter/module change I found that all the LG 260 modules in this >> system have one MC4 connector and one H4 connector. At present I'm >> convinced the mismatched connector is the actual cause of the problem. >> Anyone else ever notice find PV modules with mixed MC4 and H4 connectors? >> >> Kent Osterberg >> Blue Mountain Solar >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org/> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org/> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org/> >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> > > Check out or update participant bios: > www.members.re-wrenches.org <http://www.members.re-wrenches.org/> > > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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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