Which component ensures electrical safety by preventing overloads in circuits?

The circuit breaker is the component responsible for ensuring electrical safety by preventing overloads in circuits. It functions as a protective device that automatically interrupts the flow of electricity when it detects an excess current that could potentially lead to overheating or fire hazards. When the electrical current exceeds the safe level for the wiring system, the circuit breaker trips and opens the circuit, cutting off the current supply. This action helps to safeguard both the electrical system and connected devices from damage due to overloads.

In contrast, while the bonding jumper is important for providing a safe path for fault current and grounding, it does not directly manage circuit overloads. The branch circuit refers to the distribution of electricity within a specific area of a building but does not provide protective functions itself. The cabinet typically houses electrical equipment and does not play a role in preventing overloads. Thus, the circuit breaker is essential for maintaining safety in electrical systems by actively managing and mitigating the risks associated with overload conditions.