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What do the symbols and letters on household electrical circuit breakers mean?
Type A electrical circuit breaker: It is used to protect sensitive and medical devices and some electronic circuits. This type of circuit breaker is quick and immediate without waiting for any moment.
Type B circuit breaker: It is used to protect household appliances and physical loads, such as: lighting circuits, heaters, and small motors. The type withstands between 3 to 5 times the load current before disconnection.
Type C circuit breaker: It is also used to protect the electrical wiring network and industrial workshops, especially in inductive loads that have a high starting current, such as: pumps, fans, motors, and air conditioners, and it bears between 5 to 10 times the load current before disconnection.
Type D circuit breaker: It is used in applications that have very high starting currents, such as large motors, large electrical transformers, and high-induction welding machines. This circuit breaker can withstand 10 to 20 times the load current before disconnection.
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