Which statement is an advantage of circuit breakers over fuses?

• A. Breakers can be reset after trip and can be used as a switching device
• B. Breakers are cheaper
• C. Breakers have smaller size
• D. Breakers require replacement after trip

Answer: (A)

The main idea is that a circuit breaker is a reusable protective device. When it detects a fault, it trips and stops current, and it can be reset afterward to restore service without replacing anything. This means you can quickly re-energize the circuit by flipping the breaker back on, and you can also use it as a convenient on/off switch to disconnect power for maintenance or testing. A fuse, on the other hand, sacrifices itself by melting open and must be replaced after it blows; it can’t be reset or used as a switching device once it has operated. That is why the ability to reset after trip and function as a switch is the key advantage of breakers over fuses.