this got me curious. Here is the only picture I can find of anything rated for fine strand distrubution block. Notice it has an extension on the bottom of the compression screw. Which I guess is keeping the find stands out of the threads.
Nothing else I can find says it’s rated from fine strand. Happy to be proven wrong. jay https://www.hubbell.com/burndy/en/products/bdblcs7r1dw-large-flex-rated-power-distribution-block/p/8517004 > On Sep 3, 2025, at 3:56 PM, Kirk Herander <[email protected]> wrote: > > IMO, any OEM that recommends a ferrule does not use fine-strand rated > compression lugs in their equipment. > > Rated lugs do exist, they just don’t seem to be spec’ed by OEMs. > > I don’t like ferrules on battery cable and always use fine-stranded > compression PDBs when building custom battery combiners. > > > > > <> > Kirk Herander / <>[email protected] <mailto:[email protected]> > Owner|Principal, VT Solar, LLC > Celebrating our 34st Anniversary 1991-2025!! > dba Vermont Solar Engineering > 802.559.1225 > > > On Wed, Sep 3, 2025 at 5:38 PM jay via RE-wrenches > <[email protected] > <mailto:[email protected]>> wrote: >> From my memory none of the compression lug style are rated for fine stand, >> at least without a ferrule. >> >> Because strands can get into the threads and bind, making it seam like its >> tight but its not. >> >> But I could be wrong >> >> >>> On Sep 3, 2025, at 2:39 PM, Ray Walters via RE-wrenches >>> <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> I've got to ask: Are none of the lugs on these Chinese inverters approved >>> for fine strand cable? I just have not had a problem with that, but I've >>> mostly used Magnum, Midnite, and Outback equipment over the years. What >>> were the lugs on the old Trace DC 250 boxes? Were they fine strand rated? >>> They sure were tough to get 4/0 into, as William mentioned. >>> >>> Ray >>> Remote Solar >>> >>> On 9/3/2025 12:57 PM, Kent via RE-wrenches wrote: >>>> William, >>>> >>>> If the only reason the ferrule wouldn't fit after using the hex crimper >>>> was the ridge left where the dies meet, you could rotate the cable 120 >>>> degrees and crimp the ferrule again. >>>> >>>> I doubt that the indenter crimper will do a decent job with large ferrules. >>>> >>>> I do like your thin piece of copper solution. Not UL approved but I dare >>>> say wrench approved. >>>> >>>> Kent Osterberg >>>> Blue Mountain Solar >>>> >>>> >>>> On 9/2/2025 8:55 PM, William Miller via RE-wrenches wrote: >>>>> Friends: >>>>> >>>>> Thank you for all of your input on this question. I feel it only right I >>>>> report back how this turned out >>>>> >>>>> I tried a crimper like this: >>>>> >>>>> >>>>> >>>>> It left a jagged ridge on both sides of the ferrule where the dies met. >>>>> >>>>> The crimper below was suggested but I have not tried it: >>>>> >>>>> This was suggested but I have not tried it either: >>>>> >>>>> >>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> <http://re-wrenches.org/> >>> >>> List Address: [email protected] >>> <mailto:[email protected]> >>> >>> 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/[email protected]/ >>> 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 <http://www.members.re-wrenches.org/> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> <http://re-wrenches.org/> >> >> List Address: [email protected] >> <mailto:[email protected]> >> >> 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/[email protected]/ >> 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 <http://www.members.re-wrenches.org/> >>
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