First make sure there are no motors on that circuit. If not, then use a receptacle tester (the one that plugs in with three lights) and see if it is properly wired. Next step is to check for an unbalanced neutral at that receptacle. Measure both hot and neutral with respect to the ground. Anything more than a few volts on neutral to ground is not normal. Also check the hot to ground voltage at all other receptacles on that circuit. Any difference is the results of loose wiring, which can cause arcing. Any of the above will make transformers sing.
Can moving wire location at circuit breaker reduce hum?
The power line going into my music room will oftentimes make the amps’ transformers hum. I’ve tried many things but have had no luck. If I take any component that’s humming into a different room run on a different circuit breaker, the hum disappears.
Would swapping out the wires that go into the two separate rooms at the breaker make any difference? Or is it more likely that one of the outlets on the circuit that goes into my music room is somehow miswired and is causing the hum? I can unplug everything from the circuit except for my amp and it still hums.
Any suggestions on what I might be able to do short of hiring someone to run a dedicated line?
Thanks,
Mamoru