I also have not been able to confirm that the Wagos are listed for use with DC.
We have been using them on AC circuits for almost a year now. Also not listed for moist or wet environments… -Glenn From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Chris Sparadeo Sent: Wednesday, April 28, 2021 10:38 AM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] MC4s are listed for THWN, right? Keep in mind that Wagos, Polaris lugs, Multi-tap Burndy lugs are rated for 600V. I can see this being a possible use for MC4 connectors in a higher voltage splice scenario, because of their 1000V/1500V ratings. On Wed, Apr 28, 2021 at 10:00 AM August Goers <aug...@luminalt.com <mailto:aug...@luminalt.com> > wrote: Hi Allan - Good question, I noticed that too. I think it is a typo, and they mean 20 AWG through 10 AWG. See attached datasheet. 6 mm^2 is close to #9-#10 AWG. There are other variants available as well with smaller conductor sizes for data cables and more ports for connecting in parallel. August On Tue, Apr 27, 2021 at 6:10 PM Sindelar Solar <al...@sindelarsolar.com <mailto:al...@sindelarsolar.com> > wrote: August, Thank you for this suggestion. I went to the site, and under "Two Sizes for All Conductor Types" on that page it appears that there's a model that'll work with 2-10AWG conductors: "With the 6 mm2 (10 AWG) variant, you can connect all conductor types – with cross sections from 0.5 to 6 mm2 (2−10 AWG)". This would contradict what you wrote below, so I'm just checking whether I missed something. Thanks, Allan On 4/27/2021 12:55 PM, August Goers wrote: Hi Jason - I noticed that Tesla is using the Wago connectors in their Powerwalls. They only go up to #10, but they certainly appear to have some advantages such as easy QC inspection, compactness, and price. We are in the process of trying a batch of these out, but I hadn't considered using them in exterior J-boxes. https://www.wago.com/global/electrical-interconnections/discover-installation-terminal-blocks-and-connectors/221 August On Tue, Apr 27, 2021 at 10:42 AM Jason Szumlanski <ja...@floridasolardesigngroup.com <mailto:ja...@floridasolardesigngroup.com> > wrote: I'd be interested to hear thoughts on Wago 221-6XX series connectors, specifically for THWN to Enphase IQ/DG/TC conductor transitions or just THWN splices. On Mon, Apr 26, 2021, 8:40 PM Blake Gleason <bl...@sunlightandpower.com <mailto:bl...@sunlightandpower.com> > 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 On Mon, Apr 26, 2021 at 5:19 PM Corey Shalanski <coreso...@gmail.com <mailto:coreso...@gmail.com> > wrote: Blake, In addition to Bryan's notes, here is some unconfusing information directly from Stäubli's engineering dept: The answer is categorically no: you cannot use THHN wires with MC4 connectors. There are several reasons for this: 1. Certification: our MC4 connectors are certified to UL6703, which only covers UL4703 PV wire or USE2 cable. Any other wire type is not covered by our certification 2. Internal validation: we have no internal testing or validation of how MC4 or Evo2 connectors perform with THHN cables. We therefore cannot warranty / accept the use of THHN cables with our PV connectors. The allowable cables and applications for our PV connectors is clearly stated in the assembly instructions. 3. Construction: THHN cables use very rigid PVC insulators, which behave very differently than XPLE or TPE insulators that are the most widely used on PV wires. PVC has a very low elastic range and easily deforms permanently under load/thermal cycling. It is not a well-suited cable for higher temperature or high temperature fluctuating applications where compression-type cable seals (i.e. cable glands) are used. Also, THHN cables tend to be single-conductor solid core cables, which are absolutely not allowed with crimp terminations like the MC4 (or any other PV connector on the market for that matter). They also are not allowed by UL6703. These comments were forwarded to me by Jeff Wang, who works for Stäubli North America. -- Corey Shalanski Jah Light Solar Portland, Jamaica On Mon, Apr 26, 2021 at 9:23 AM <bl...@sunlightandpower.com <mailto:bl...@sunlightandpower.com> > wrote: Bryan, Thank you for the link. I am confused by the "PVC" section you referenced. Here's the complete text: For safety reasons Stäubli prohibits the use of PVC cables. Cables made from PVC can be connected to MC4-Evo 2 since the insulation material of the connector (Polyamide) is suitable to be connected to PVC. PVC cables usually have an upper limiting temperature of 70 °C, in fixed installations sometimes 80 °C. THHN/THWN-2 is made with PVC insulation, so I assume that it falls under the category of a "PVC cable." So, the first sentence seems to say that it's not allowed by Staubli. But then the second sentence seems to say that is IS allowed. And then the third sentence doesn't seem to be contemplating the most common PVC wire type of all (in the US), which is THHN/THWN-2, which has a 90 degree rating?! Can you help un-confuse me? Thank you! Blake List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org 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 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 -- Allan Sindelar al...@sindelarsolar.com <mailto:al...@sindelarsolar.com> NABCEP Certified PV Installation Professional New Mexico EE98J Journeyman Electrician Founder (Retired), Positive Energy, Inc. 505 780-2738 cell _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org 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 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 <mailto: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 -- Chris Sparadeo C_802-369-4458 H_802-728-3059
_______________________________________________ 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
