If an electrical panel makes buzzing, crackling or hissing sounds, it should not be treated as normal. The cause may be a loose contact, heated breaker, overloaded line or faulty terminal.
An electrician checks breakers, terminals, neutral and grounding bars, load distribution and heat under load. A larger breaker should not be installed without checking the cable.
Burning smell, crackling, darkened insulation, warm breakers and flickering lights require urgent diagnostics. The panel should be inspected by a professional.
