The buzzing sound is usually caused by the flow of electricity through the panel's components, such as the circuit breakers, fuses, or busbars. However, it's essential to investigate the cause of the buzzing to ensure it's not a sign of a more serious issue. When they start tripping, overheating, or making strange noises, it's more than just an inconvenience - it's your home's cry for help. An overloaded circuit can. A quiet circuit box is something most of us take for granted. Even in a busy Ottawa summer, it's hard. The first step in addressing an electrical noise is determining its physical source, which requires a methodical isolation process. There are several reasons why your panel might be.