Review on Supco M500 Insulation Tester: Reliable Megohmmeter for Accurate Measurements, Includes Soft Carrying Case, 0 to 1000 Megohms by Owoeye Reed

I had a bad feeling about what we were doing so I ordered this simple tester to confirm my suspicions. A 3 phase network is going down a pole and the guy powering the wires crossed the wires and they got stuck. I tested all 3 phases and one of them didn't work very well. We were able to pull out enough cables to find the damage. Luckily for the electrical company we had enough slack on the mast and were able to cut the bad spot compared to the splice/shrink tubing. If we let him go, the feeder would explode underground, necessitating replacement of all the cables and the pipeline that was now buried under the tarmac. Saving over $20,000 in labor and $89 in tester copper. From now on they will be used in all our service vehicles. The best part is that you don't have to be a genius to figure out how to use it and if there's a problem.