I went out to my shop and tried my 3/0 ferrule on 4/0 cobra wire. It fit. The sleeve that goes over the insulation won’t fit. But that could be cut off.
Just a thought Jay > On Sep 3, 2025, at 5:33 PM, James Jarvis via RE-wrenches > <[email protected]> wrote: > > William, > > None of the crimpers you sent photos of are for ferrules. Those are all lug > crimpers. Some are barely that. Nobody should be seriously considering > anything you hit with a hammer to be a proper tool for installing any type of > connector. > > Ferrule crimpers produce a square crimp and do what they are supposed to. > > Last Wednesday I sent you a note with this link: > https://www.ferrulesdirect.com/collections/hand-crimping-tools/products/vag240 > > It makes a square shape and won't have weird edges and the artifacts you > mention you get when you smoosh a ferrule with a non-ferrule crimper. > > Ferrules are highly useful and reliable when installed correctly. You just > need the right tool. > > The other thing I mentioned last week were pin adapters. They are crimp on > fittings that are rated for fine stranded wire and they convert it to course > stranded or solid shape. Here was the example I sent: > https://www.ilsco.com/Ilsco/ccrz__ProductDetails?sku=F2C-1%2F0-1%2F0-ILSM-ILS&cclcl=en_US > > > > > Best regards, > > > > -James Jefferson Jarvis > APRS World, LLC > +1-507-454-2727 > http://www.aprsworld.com/ > > > On Wed, Sep 3, 2025 at 6:10 PM William Miller via RE-wrenches > <[email protected] > <mailto:[email protected]>> wrote: >> Friends: >> >> >> My understanding is if the lug has a set-screw that contacts the strands, >> fine strands can wind around the set screw, get into the threads and not >> tighten adequately. If you are crimping fine strands inside of some type of >> barrel your connection should be OK. >> >> >> I had been using Outback until they imploded and all of the battery >> connections were via studs or bolts that required crimped-on rings. Now I >> am back to set screw lugs and fine stranding became an issue again. >> >> >> I did try another experiment: I took a 4/0 ferrule that would not fit into >> the Envy lugs and snipped a section out of it. I curled it into a slightly >> smaller diameter and it fit into the lug. I suppose one could cut the >> ferrule in half longitudinally and insert a portion of the ferrule between >> the set screw and the strands. >> >> >> I am pleased with the copper sheeting wrapped around the fine strands. That >> will be my SOP. >> >> >> William >> >> >> Miller Solar >> >> 17395 Oak Road, Atascadero, CA 93422 >> >> 805-438-5600 >> >> www.millersolar.com <http://www.millersolar.com/> >> CA Lic. 773985 >> >> >> >> From: RE-wrenches [mailto:[email protected] >> <mailto:[email protected]>] On Behalf Of Ray Walters >> via RE-wrenches >> Sent: Wednesday, September 3, 2025 1:40 PM >> To: [email protected] >> <mailto:[email protected]> >> Cc: Ray Walters >> Subject: Re: [RE-wrenches] Ferrules for large fine-stranded wire. >> >> >> 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 > > List Address: [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 >
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [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
