The answer to 'why is my fuse box buzzing noise' is that a buzzing sound coming from your fuse box or circuit breaker panel is often caused by a loose or faulty electrical connection. This can happen when the connections inside the panel become loose over time, or if there is a problem with the wiring or components.
The buzzing noise is a warning sign that something is not right, and it's important to address it promptly to prevent further issues. Buzzing can also be a sign of an overloaded circuit, a failing component, or even a fire hazard. If you hear a persistent buzzing, it's best to shut off the power to the panel and call a licensed electrician to inspect and repair the issue.