Some junction boxes have specific instructions for weep holes. For scepter PVC junction boxes you can drill a 3/16 inch hole in the bottom to make a nema 4 enclosure nema 3R. The instructions are etched into the bottom of the box.
Jason On Thu, Apr 29, 2021, 11:46 AM Ray <r...@solarray.com> wrote: > Hi Glenn; > > Ahh that's new from NEC 2014. Thanks for pointing that out, and scratch > my previous comment based on experiences in 2008. > > Ray Walters > Remote Solar > 303 505-8760 > > On 4/29/21 11:41 AM, Glenn Burt wrote: > > NEC 314.15 discusses drainage openings that can be made in enclosures. > > > > -----Original Message----- > > From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf > Of frenergy > > Sent: Thursday, April 29, 2021 9:43 AM > > To: re-wrenches@lists.re-wrenches.org > > Subject: Re: [RE-wrenches] MC4s are listed for THWN, right? > > > > Eric, > > > > I like your idea of drilling the weepage holes as long as > they are not big enough to allow critters like wasps to make a home inside > the J-box. We will use aluminum tape on unused mounting holes in the back > of the box for the same reason. Lurkers welcome. > > > > Bill > > > > Feather River Solar Electric > > Bill Battagin, Owner > > 4291 Nelson St. > > Taylorsville, CA 95983 > > 530.284.7849 > > CA Lic 874049 > > www.frenergy.net > > > > On 4/28/2021 6:19 PM, erics...@vermontel.net wrote: > >> Wrenches, > >> > >> I am normally a lurker on the List, but I would like to add a fact > >> observation and a personal preference to the topics raised by this > >> discussion. > >> > >> First, THWN does have PVC as its primary insulation, but it is > >> sheathed in Nylon which is a polyamide plastic. Therefore the > >> compatibility with MC4 connectors should be polyamide being squeezed > >> by the restraining bushing in the MC4, not PVC. > >> > >> I prefer Buchanan copper crimp connectors when splicing PV wire to > >> THWN-2 in a roof junction box. The bared wires should be lightly > >> doped with NO-OX-ID A-Special grease > >> https://www.sanchem.com/electrical-contact-lubricant.html > >> <https://www.sanchem.com/electrical-contact-lubricant.html> before > >> sleeving and crimping with the crimp sleeve to repel entry of moisture > >> and corrosive gasses into the wire joint. I consider the crimped > >> joint to be superior to any screw-clamped joint that would be made in > >> a Polaris style connector. I also drill weepage holes in the bottom > >> corner of the junction box to mitigate any collection of water. > >> > >> Eric Stevens, Vermont Made Energy > >> > >> > > -- > > This email has been checked for viruses by Avast antivirus software. > > https://www.avast.com/antivirus > > > > > > _______________________________________________ > > 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 > > > _______________________________________________ > 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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