Which Stranded Copper Wire Splice Is Best? Find Out!

Wondering which stranded copper electrical wire repair, splice, or tap method is best? Then look no further than this video for an answer! I'll be testing 8 different splices. Which splicing method has the lowest voltage drop? Find out! DIY electrical repair. Enjoy the video, and be sure to share. Thanks guys!

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[ProjectFarm]

I've always wondered about this one! Thank you for the terrific video!!

[dondecker]

As a former Engineer, I am truly impressed by this video. Congratulations on a job well done. Everything that was important was covered in a very clear and concise manner. You get a gold star for your efforts.

[MRCNC]

When joining wires together, whether stranded or solid, you can't beat the reliability of a soldered 60/40 rosin connection and then covering with a quality piece of shrink tubing. This video proves it.

[whitneyschuster]

i wish every single explanation or demonstration video was made like this. really impeccable production. super clear, good pacing, no BS, and very sound testing methods. just fabulous.

[Joe_Not_A_Fed]

Fascinating. Ultimately, while the worst connection had almost 3 times more resistance than uncut wire, the worst total resistance difference was so small, that it would be insignificant in virtually any real life applications. It makes me feel better about my twisted wire connections.

[andrewjameslyon]

Thanks for this.
I recently repaired a cable on my grandmother's electric wheelchair using a twist & 60/40 solder.
I'm glad to see I made a good choice!

[Robnord]

Interesting! If you do end up doing another, comparing _Wagos_ to wire nuts with a high draw AC load would be appreciated. I'm not quite sold on the new product yet, especially in amp draw situations that near the rated capacity of the wire.

[beakittelscherz]

This stuff should be shown in physics class in school. I def. would have enjoyed that!
Great vid! Thumps up!

[kirkpennell]

Awesome video, would have liked to see posi-loc connectors and those new heat shrink and solder at once connectors. Thanks again for the great information

[josephsfields]

Nice job and thanks for taking the time to show your scientific method. You know how we techs love to sit around and expostulate and criticize the techniques of others before and after leaving the shop? Well this video proves that taking the time time and trouble to solder is worth that trouble unless you don't mind a sub par connection.

[solarsynapse]

If you want/need extra physical strength, you can use a Western Union splice like what has been used for overhead power wires. You make a "U" shape for each end, hook them together and twist the tail around the opposite wire. I solder them.

[EngineerMikeF]

Great vid. I'm willing to bet crimp connectors using a superior crimp tool (Klein or Channelock) would improve on the sheet metal crimp tool. Pro grade tools have wider crimp profile so more crimp contact area & a more reliable mechanical connection w/out breaking copper strands in my experience.

[karllaun]

Another very interesting and informative video. Another one I would like to see is one of those heat shrink connectors with the band of solder built in. I'd expect it to perform as well as the tinned and reflowed connection.

[MojoPup]

Nice to see my instincts verified. I've always done a 'twist 'n solder' method with shrink tubing. Only used solderless connection for a) Areas that I couldn't solder, or for items that would need to be removed later. But even then, I tend to solder the stranded wire to the connector.

[davidgutting]

I’m going to assume a twist on wire nut is about the same as twisting wires together. If you are going to evaluate wire nuts, please consider ones with and without metal inserts. The epoxy was surprising as well as the crimp on connectors. Thanks for doing this test.

[craignehring]

Great data, thanks for going through them. I know that if a wire is subject to really high current load(s) you would want a heavy duty crimp or actual terminal block.
Soldering wires that are properly fused is my choice in automotive/marine applications to keep corrosion at bay

[stevebabiak]

You should use a “Kelvin bridge” to measure the very low resistance of each test candidate when cold and after the load is disconnected.

[HostileHST]

Future colab with Project Farm! WOOT!!! Awesome video!

[johntoe]

Very interesting. I thought the soldered joint would be almost as good as solid wire, but I never thought it would be BETTER. It makes sense though, that the added thickness would reduce resistance.

[RichardT]

I’m disappointed you missed the heat shrink connector with solder paste. Great video none the less!! Thanks