The circuit breaker that has tripped is typically the one associated with the circuit that is overloaded or experiencing a fault. When a circuit breaker trips, it is designed to open the circuit, preventing damage to the electrical system and potential hazards such as fires. To identify which circuit breaker has tripped, you would look for the one that is in the "off" position or has a red indicator light. This specific circuit breaker should be checked for any visible signs of damage or overload, such as excessive heat or burn marks.

In residential settings, circuit breakers are arranged in a panel box, often referred to as a breaker box or fuse box. Each circuit breaker is typically labeled with the room or appliance it serves, making it easier to locate the tripped breaker. For instance, a circuit breaker labeled "Kitchen" would be associated with the kitchen's electrical load.

The reason for the tripping can vary. Common causes include:

1. Overload: When too many appliances or devices are connected to a single circuit, it can exceed the circuit's capacity, causing the breaker to trip.

2. Short Circuit: A short circuit occurs when an electrical current takes an unintended path, often due to damaged insulation or wiring, which can cause the circuit breaker to trip.

3. Ground Fault: A ground fault happens when an electrical current leaks to the ground, which can be caused by a fault in the electrical system or a faulty appliance.

According to the National Fire Protection Association (NFPA), electrical distribution systems are the second leading cause of home fires, and faulty wiring or overloaded circuits are significant contributors. In 2019, U.S. fire departments responded to an estimated 48,500 home structure fires that were related to electrical distribution or lighting equipment, accounting for 8% of all reported home structure fires.

In conclusion, identifying the tripped circuit breaker involves checking the panel box for the one that is in the "off" position or has a red indicator light. The specific circuit breaker should be inspected for signs of overload or fault, and the cause of the tripping should be addressed to prevent future occurrences.