Can circuit breakers be used for switches?

Circuit breakers can serve multiple functions, one of which is to act as a switch under specific conditions. However, safety standards and electrical codes dictate that only certain types of circuit breakers are suitable for this purpose. The ones designated as "SWD" (Switching Duty) are specifically rated for frequent on/off cycling, making them an appropriate choice for use as a switch.

Using a circuit breaker as a switch that is not marked as "SWD" can lead to issues such as premature wear or potential failure of the breaker, as standard circuit breakers are primarily designed to protect circuits from overloads and short circuits, not for regular switching operations. Therefore, a circuit breaker can only be used as a switch if it is explicitly marked for that function, underscoring the importance of complying with manufacturer specifications and safety regulations in electrical work.