I use a zareba 100 mile low impedance AC charger for my horses. Max rating is 13.6 kv. I run 2 strands which probably totals less than two miles of wire. Bought the digital tester by zareba which maxes out at 9.9 kv. I've accidentally bumped it 3 times and each time it liked to stop my heart for a while.
On my clear wire, the tester shows the max of 9.9 kv. What i've noticed is that it may go down to 2.2 kv if it shorts up against the barbed wire or something. Something else I've noticed is that if it does short out cause of weeds or whatever, the tester will read the same voltage whether I'm checking it at the charger or a half mile away. I walked the wire to check this out. Now I just keep the tester in the barn by the charger and test it there every few days or so. I think with the other style you walked the fence and tested to find the problem.
With little calves, you may want to run an extra wire that is grounded every so often. Put it so that when a calf sticks his head between the wires, he contacts the hot and the ground and really gets zapped. That also helps during those hot dry summers when the earth/ground gets so dry that current doesn't flow very well to your ground rods. Normal current flow is from the hot wire, through the animal touching the wire, the hooves and earth/dirt where the animal is standing, and then through the earth/dirt to your ground rods attached to the charger.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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