solid vs stranded wire RJ45 crimp-on connectors

What a day … I’ve just learned something that should end years of anguish!

For years I’ve built my own ethernet cables, hundreds of them. From time to time I would struggle getting a reliable cable made, crimping on many connectors sometimes only to clip them off and try another before getting a reliable cable built.

Today a colleague taught me that there are two kinds of RJ45 crimp-on connectors and that when you try to use connectors designed for stranded wire but the cable is solid wire it is very difficult to build a reliable cable.

Sheesh! I can’t wait to toss my stranded wire connectors and get new ones that should work much better with my solid wire cable!

When buying connectors be sure to ask for the right ones.

When you view an unused RJ45 connector from the side the solid wire design has a single tip on the bottom of each contact to pierce the insulation to make contact when crimped and the stranded design has two piercing tips.


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2 Comments on “solid vs stranded wire RJ45 crimp-on connectors”

  1. I’ve read dozens of ‘articles’ pronouncing the horrible dangers of using stranded plugs with solid conductors and vice-versa, but not a one of them (until now) bothered to mention WHAT IS THE FREAKIN’ DIFFERENCE BETWEEN THE TWO so you can actually tell them apart. Thanks!

  2. The freakin’ difference is the way they grab the copper inside the wire when you push down on your tool. The stranded version is supposed to have two teeth that just go inside through the stranded wires and make contact. Obviously, that’s not the case with solid copper where there are two or three (depending on construction) teeth that go on each side of the solid copper wire ambracint it, sort of speak. If you cannot tell visually, pull out one tooth from the connector and see the other end, the one that’s making contact inside. Teeth on same plane = stranded connector. Teeth on different planes = solid connector. Hope it helps.

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