0.5 to 6 mm2 is #20-#10 AWG On Tue, Apr 27, 2021, 9:10 PM Sindelar Solar <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> 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> >> 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> >>> 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> 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 > > 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 > 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 > > 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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