What does it mean when my non-contact volt meter starts sounding about 6 inches before touching any wires? I’m thinking bad ground somewhere. Am I wrong? Thanks.
Your non contact tester measures a field. At some level it triggers, some trigger around 40v so there will be inches of difference depending on if the wires are high voltage or lower voltage, I have one tester that starts chirping when I enter a 4160 transformer room or at my old plant my service line was +21kv it chirped when I was under the line or inside the chain link it all depends on the model.
In the U.S. the max voltage to ground is 120 and most industrial sites are 277 to ground but the L to L voltage is 240 and 480 so it all depends on the tester and the voltage tested.
Waiting for internet only down votes.