Hi George, It's good to see you're still with REC. I'd assume this would fall under the purview of UL rather than NEC. Anything that meets UL will pass NEC. With temperature derates I think you'd have had to go to larger wire long ago to meet NEC standards.
It might be good to go to a larger wire to keep V drop low. Brad Bassett retired, but still interested. On Wed, Nov 8, 2023 at 9:07 AM George McClellan via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Team; > > > > With the move to larger cells, some modules have an Isc that is pushing > the limits of 12 AWG wire. If I apply the rule of 156% (or 125% solar > derate*125% continuous load derate) to an 18 Amp Isc module this will > exceed the 25A that a 12 AWG wire can carry. I understand that the > homeruns will need to be a larger AWG (10 ga), but do the solar module > cables (from junction box to MC4) also need to be larger? Any guidance or > reference material would be greatly appreciated. > > > > Thx, > > > > George McClellan | Senior Technical Sales Manager | REC Americas LLC > > 330 James Way Ste 150 | Pismo Beach, CA 93449 | USA > > Cell phone +1 805 704 3226 | Fax +1 805 357 6104 > > www.recgroup.com | george.mcclel...@recgroup.com > <shannon.k...@recgroup.com> > > > > ------------------------------ > > This message is private and confidential and may be privileged. Any > unauthorized use, dissemination of the information or copying of this > message is prohibited. If you have received this message in error, please > notify us immediately and remove it from your system. Thank you. > _______________________________________________ > 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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