@erik_squires
After finding the corroded line in the meter, moving the system (2- 20A lines) to the opposite leg greatly reduced the volume of the hum in the Equi=Core. When this hum presented and for the past month, it was so LOUD that it could be heard in the next room. Now it is many dB lower, but still audible from 12 ft. away.
As far as to how frequent it hums, it's too soon to say.
After finding the corroded line in the meter, moving the system (2- 20A lines) to the opposite leg greatly reduced the volume of the hum in the Equi=Core. When this hum presented and for the past month, it was so LOUD that it could be heard in the next room. Now it is many dB lower, but still audible from 12 ft. away.
As far as to how frequent it hums, it's too soon to say.