Which statement best describes circuit breakers in relation to switches?

Which statement best describes circuit breakers in relation to switches?

• A. Circuit Breakers Have Lower Interrupting Capacity Than Switches
• B. Circuit Breakers Have Higher Interrupting Capacity Than Switches
• C. Circuit Breakers And Switches Have The Same Interrupting Capacity
• D. Circuit Breakers Can Only Interrupt Current In AC Circuits

Answer: (B)

The key idea is how much current a device can safely interrupt and why breakers are designed differently from switches. A circuit breaker is built to interrupt fault currents and automatically trip to open the circuit when the current becomes excessive. This requires a high interrupting capacity so the device can break large, potentially damaging currents without itself failing. A switch, in contrast, is mainly for manually opening or closing a circuit during normal operation and is not designed to safely interrupt large fault currents. So circuit breakers offer a higher interrupting capacity than switches, which is why they’re used for protection rather than just isolation. The other statements don’t fit because they either imply the same or lower capability, or they misstate the scope (interrupting capability applies beyond just AC).

The key idea is how much current a device can safely interrupt and why breakers are designed differently from switches. A circuit breaker is built to interrupt fault currents and automatically trip to open the circuit when the current becomes excessive. This requires a high interrupting capacity so the device can break large, potentially damaging currents without itself failing. A switch, in contrast, is mainly for manually opening or closing a circuit during normal operation and is not designed to safely interrupt large fault currents. So circuit breakers offer a higher interrupting capacity than switches, which is why they’re used for protection rather than just isolation. The other statements don’t fit because they either imply the same or lower capability, or they misstate the scope (interrupting capability applies beyond just AC).