Jointing underground solid core twisted pair cables

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dr pepper

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I want to run Rs485 over a moderate distance, I've done this before using twisted pair solid core as I can get a good price.
Last time I welded the wires, first twisting them then melting the end into a blob with oxy acetylene, then stuffing the joint into a potting box with epoxy.
I dont have the gas to weld them anymore, I see telecomms engineers use crimp terminals, is this the way to go?
 

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if Telecom engineers do it, why shouldn’t you? I would just be concerned about corrosion and impedance mismatch.
 

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Hi,

Why welding? In electronics we use soldering.

A shrink tube, or shrink tube with hot melt glue inside to protect it against corrosion.

*****
There are special crimps for underground joining.
Good crimps with high force generate a oxygen free cold welded joint.
There are also mor simple crimps that have grease inside to protect the joint against humidity.

I guess an internet search gives many fast and good results.

Klaus
 

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Cos I have oxy acetylene on my van, not much more difficult than a gas solder iron to get out.

OK I'll see if I can get some of those crimps.
I think I've seen thos terminals with the sticky goop inside.
 

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Found some dealies that are much like torpedo joints on armoured cables, only smaller.
 

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we use soldering rather than welding because of thin wire flexible metal like silver wire, welding can damage the copper circuit.
 
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