I would add to the conversation that you must know what type of insulation is
on the wire. I picked up about 5000 ft. of 20 ga. wire at a hamfest and I used
it to put down about 70 radials on my shunt fed tower. I also used it for a
dog fence. About four years later, the dog fence wire started failing. The
insulation had gotten hard and would crack. Once it cracked, I assume that the
moisture in the ground along with the soil acidity dissolved the wire. I
don't know what the insulation was, but I had to completely re-do both the dog
fence and the radial field. I went with Teflon insulation 30 years ago and
have not had a failure.
I've not heard of dog fence wire insulation failing, so there must be
insulation on it that will endure the conditions in the ground.
Jim - KR9U
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