This transformer is installed in the utility closet of a 1970's condo.
Notice the wad of cut paper sheets pinched between transformer and the wall plate. This is an attempt at halting a low-tone humming caused by the transformer. Is there a better way to avoid this annoying hum?
And should a transformer be exposed in the open like this? If this is proper, are there covers available to hide the ugly and protect the wires?