Had you just discovered this hum? Is it possible it has been humming all
along? Sometimes when heavy load is being pulled through a circuit breaker
it will hum for a moment. Is it possible that there is a transformer near or
in the panel, for a doorbell . That would be a very likely source for a
continuous hum



"Randy" wrote in message
ups.com...
I am hearing a vibration (humming) noise from my circuit breaker box.
Any ideas of the problem?