However if it is not listed as compatible with it, why use it?-GlennSent from my 'smart'phone, so please excuse typos and spelling errors.------ Original message------From: drake.chamberlin@redwoodalliance.orgDate: Tue, Apr 27, 2021 1:42 PMTo: RE-wrenches;Cc: Subject:Re: [RE-wrenches] MC4s are listed for THWN, right?On a practical note, MC-4 functions fine with THHN inside a weather proof enclosure. It will not seal, due to the smaller overall diameter of the cable.
THHN is rated for 90C. It is not sunlight resistant, and should never be used exposed. --- On 2021-04-26 23:16, frenergy wrote: > Blake, > > Its great to get definitive clarification on this MC4/THHN > issue, we've been using 4-14 Polaris connectors with good results. > Being inside a Nema3 can and having silicone grease in the Polaris > makes for a solid, durable connection. Inspecting some of these that > are now 17 years in the field shows very good condition for the wire > landing in the Polaris and the condition of THWN-2 wire insulation. > We haven't had the best of luck with Buchanans. > > Bill > > Feather River Solar Electric > Bill Battagin, Owner > 4291 Nelson St. > Taylorsville, CA 95983 > 530.284.7849 > CA Lic 874049 > www.frenergy.net > > On 4/26/2021 5:41 PM, Blake Gleason wrote: >> Corey, >> >> Thank you! Agreed, the message from Staubli's Eng dept is much less >> confusing (with the exception of the statement about THHN tending to >> be solid vs stranded). >> >> All - >> What are you folks using to transition from PV Wire to THHN/THWN-2 >> inside a junction box? We used to use split bolts, which make an >> awesome electrical connection, but are time-consuming and not easily >> serviceable. Wire nuts (the right ones) are Listed, but never felt >> reliable for that purpose. Same for WAGO levers. I hear about people >> using Buchanan splice caps, but I wonder about trading one set of >> crimping problems for another. And of course, the only problem with >> using THHN in an MC4 is that the compression gland may not be as >> watertight as it is with PVWire, and the Buchanans certainly are not >> watertight. Terminal blocks generally aren't listed, definitely >> aren't watertight, and raise inspectors' eyebrows. Why is this so >> hard for me?? >> >> Best, >> Blake >> Thanks >> > > -- > 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
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