What kind of "gerbils" do you have in your cage, most are furry little creatures? That is a transformer, probably for a doorbell/chime, but could be for some other low voltage application.
It is probably "piggy backed" onto the circuit breaker for some other application, rather than having a dedicated one just for the transformer. Most HVAC transformers at the unit and controlled by the unit's power on/off switch. Why is the cover removed from the service panel?
It is probably "piggy backed" onto the circuit breaker for some other application, rather than having a dedicated one just for the transformer. Most HVAC transformers at the unit and controlled by the unit's power on/off switch. Why is the cover removed from the service panel?