In Scenario 230.26, what device serves as the disconnecting means for the motor?

In Scenario 230.26, what device serves as the disconnecting means for the motor?

• A. Safety switch
• B. Contactor
• C. Circuit breaker
• D. Fuse block

Answer: (A)

Disconnecting means are the devices used to physically isolate a motor from its power source so maintenance can be done safely. They must be readily accessible and provide a clearly visible open position, with lockout capability if needed. A safety switch is designed specifically for this role: it’s a manual disconnect switch installed near the motor, giving a visible, lockable means to de-energize the motor for service or emergencies. A contactor is a control device that opens and closes the circuit under control of a starter and isn’t meant to serve as the required isolation point. A circuit breaker or fuse block provides overcurrent protection and can act as a disconnect in some setups, but they are usually placed in a separate enclosure and may not provide the required visible, lockable, in-sight isolation at the motor location. Therefore, the safety switch best fulfills the disconnecting means requirement for the motor.

Disconnecting means are the devices used to physically isolate a motor from its power source so maintenance can be done safely. They must be readily accessible and provide a clearly visible open position, with lockout capability if needed. A safety switch is designed specifically for this role: it’s a manual disconnect switch installed near the motor, giving a visible, lockable means to de-energize the motor for service or emergencies. A contactor is a control device that opens and closes the circuit under control of a starter and isn’t meant to serve as the required isolation point. A circuit breaker or fuse block provides overcurrent protection and can act as a disconnect in some setups, but they are usually placed in a separate enclosure and may not provide the required visible, lockable, in-sight isolation at the motor location. Therefore, the safety switch best fulfills the disconnecting means requirement for the motor.