Inside my shop I have my fifteen miles electric fence controller plugged in. From the controller I was using a three strand 12 awg wire that ran along my metal building about 25ft to the electric fence wire. Electric fence controllers click; so I didn't notice electricity was bleeding through the wire and arcing along the building. I'm currently only using it for about an acre and the shock around the yard was always good. The other night I happened to be in the dark and notice some arcing. I've been testing many theories until today. I used an electric fence tester and its reading about 1000 volts through the insulation anywhere on the line.
Why is this happening? This wire is good enough for a building with power tools, but a small amp fence controller can leak through its insulation. At the ground and fence knobs in the picture below; a reading will show 7000 volts. My three strand 12 awg wire allows for 600 volts. I see that is probably my first mistake.
Please help me improve this installation.