What Are the Causes of Arcing in an Electrical Panel? | Hunker Arcing in an electrical panel occurs when circuits that make up the panel become overloaded. Overheating can occur where a circuit breaker connects to an electrical panel bus. It can damage the bus as well as the connection, making equipment unreliable and prone to failure. Is a Popping Noise in the Main Breaker Dangerous? | Home Arcing Electricity. Inside the breaker box, each electrical circuit is routed through a circuit breaker designed to trip if the current exceeds its rating.