Electronics > Projects, Designs, and Technical Stuff
[advice] Crimp butt connectors for thin wire (~ 0.6 mm dia)
onesixright:
--- Quote from: Gregg on March 19, 2020, 05:33:31 pm ---
Dolphin connectors https://www.amazon.com/Dolphin-DC-100S-Super-Connector-Sealant/dp/B000JP3GB6 are typically used for these type of installations. They are available with moisture resistant grease in them and crimp nicely with any decent pliers. They have internal teeth that are supposed to bite through insulation, but I strip the wires, twist them together before inserting and crimping. They are a lot easier to use than butt connectors for thin wire and will even splice solid and solid to stranded connections.
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Thanks! :-+
--- Quote from: MarkL on March 19, 2020, 02:42:14 pm ---
--- Quote from: onesixright on March 14, 2020, 03:12:44 pm ---...
I was thinking of using "insulated butt crimp" connectors. Since the wires are pretty thin, any better solutions?
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If you mean you were thinking of 3M Scotchlok UR and UY series butt connectors, those are the ones that telephone installers use. They are great for any environment and I would use them. They are not rated for stranded, but I've never had an issue using them on stranded.
You can find the 3M ones and tons of look-alikes on Amazon. Search for "idc connector ur uy":
https://www.amazon.com/s?k=idc+connector+ur+uy
EDIT: Fixed up url.
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Awsome!
I found the 3M YU connectors, those seem to do the job (can't find in Europe the Doplhin connectors). I like there is some sort of gel in it that makes them moist resistance.
With regard to the debate: solder vs crimp. Here (@EEVBLOG) I learned crimp is better :-DD :-+
Gregg:
I first used Dolphin connectors when I helped a friend install an alarm system 40 years ago; the connections are still working although some of the motion sensors have died. I saw then at the alarm store and thought they looked like they would save some time i.e. my volunteer labor time and my friend was paying for them.
Another very good way of connecting alarm wires is to strip both ends, wrap them tightly together, solder them with minimal solder so it doesn’t wick too far along the cables and cover the splice with two layers of heat-shrink with the hot glue inside. Make the outer shrink sleeve longer to help alleviate strains on the splice. The double layer design ensures a really tight fit of the inner sleeve making the splice about as waterproof as you could get.
A tip for soldering on a ladder, wrap a couple of turns of solder on the wire and clip off the excess so you don’t have to use a hand to hold the solder.
As far as the crimp vs. solder, it depends on the situation. I have never seen really large wire soldered in an industrial setting.
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