I've been investigating this process myself for the past month or so.
While I have not seen it performed I understand it's quite a "fireworks"
It's a process that uses a powdery mixture or metals, topped off with a
"gunpowder like" starting material.
The wire and rod you're trying to bond together are held in a mold into
which these mixtures are dumped and then ignited.
Hence the fireworks show.
The advantages are a permanent non-corrosive bond which can be buried
without fear of coming apart or building up any resistance in the joint over
The tools you need are the "proper mold", a set of handles for holding the
mold together, an igniter, and the "shots" of cadweld material. The shots
can run anywhere between $3-5 each I think. The molds can run upwards of
This may seem like overkill and expensive...but when you put a lot of ground
rods in along several radials coming off a tower...you don't want to be
digging these up once a year to inspect them.
Cadwelding can be used on wire or copper strap as long as you use the right
Here's a few sites you may want to check out.
Joe - KC2TN
[mailto:email@example.com]On Behalf Of Al Williams
Sent: Friday, August 02, 2002 8:33 PM
Subject: [Towertalk] cad welding
Will someone please explain what CAD welding is when applied to
wire connections to ground rod, towers, etc. How does one get
equipped for accomplishing it?
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