How is a circuit breaker represented in TPC schematics?

In TPC schematics, a circuit breaker is represented by a rectangle with a small break in the line. This design visually communicates the function of the circuit breaker—interrupting the flow of electricity in the event of a fault or overload. The rectangle serves as the body of the breaker, while the break in the line symbolizes the circuit's ability to open or close, thus allowing or stopping the current flow as needed. This representation effectively conveys the critical safety and operational role of circuit breakers in electrical systems.

The other options do not accurately depict a circuit breaker. Solid lines indicate continuous conductors, not devices that can interrupt flow. Dashed lines typically represent alternative paths or signals, while circular loops do not correspond to the standard representation of circuit breakers in schematics.