What is the purpose of a lockout device on a fire pump controller?

• A. To prevent restart during maintenance and ensure safe operation.
• B. To allow automatic restart after a fault.
• C. To lock the pump when not used.
• D. To lock out the emergency alarm.

Answer: (A)

The lockout device on a fire pump controller is a safety feature that prevents the pump from starting automatically while maintenance or servicing is being performed. By physically or electrically disabling the start circuit, it protects personnel from a unexpected restart and ensures that the system is not energized during work. The lockout remains in place until maintenance is finished and the lock is removed, after which normal automatic operation can resume.

That’s why the best choice is to prevent restart during maintenance and ensure safe operation. It does not permit automatic restart after a fault, it does not serve to lock the pump when it isn’t needed, and it is not intended to lock out the emergency alarm.