I used to have 2 different tester for wires, one for dead wires and one for live wires. The testers was good for 120-277 volt. Sometimes when I had a broken wire, I would put the live on on the live end and the dead one on the other and it helped me to find the path between a house and a barn. Following the live side, the toner stopped by the side of a garden, and so did the dead side. I looked at the garden and saw a fence post. I asked the HO when he put in the fence and he said about 6 months ago, then I asked him when the power went out to the barn and he said, "Uhh 6 months ago." We dug down by the fence post and sure enough he hit the wire with the post.
