What does the letter "B" usually symbolize in electrical diagrams?

In electrical diagrams, the letter "B" typically symbolizes a breaker, which refers to a circuit breaker. Circuit breakers are essential components in electrical systems as they provide overcurrent protection. They automatically disconnect electrical circuits when an unsafe condition, such as overload or short circuit, occurs. This helps to prevent damage to the electrical system and potential hazards like fires.

Understanding this symbolism is crucial for anyone working in electrical fields because it aids in interpreting diagrams accurately. Knowledge of both the operational function of breakers and their representation in schematics is necessary for effective troubleshooting and system design.