How about the factory's work? Good one was, I wired in a large electric fan. Sounded like a C-130 taking off but everything checked out. A few weeks later, I got called backed because the motor flamed out. It was properly protected but the end users were resetting the tripped over loads thinking it was a timer controller.
Get a new motor, sounds like a C130 taking off and I put my amp clamp on it. This time it's over loading. Get my bosses amp clamp and it reads the same. When I originally installed the fan, my amp clamp read good. I put the old battery back in my meter which was weak and was getting bad readings. Needless to say, I deep sixed that meter
Back to the new motor. I tried everything, triple checked my wiring, sizing of wires, adjusted the motor to try to minimize the air captured by the fan. No dice. Told my boss that the only thing I could figure the motor for was the wrong size for the fan. He wigged out yelling, "you telling me the factory is churning out hundreds of theses with the wrong motor!?! Bull puckey!"
A few days later, my boss calls me in and says, "remember that fan motor? They put the wrong motor in it. They are sending the proper one.".....