Before using the last resort method, ensure that which has been disconnected?

Before using the last resort method, ensure that which has been disconnected?

• A. Power to the elevator
• B. Emergency power generator
• C. Control circuits
• D. Lighting in the machine room

Answer: (A)

The main idea is to completely isolate the elevator from electrical power before using the last resort method. Disconnecting the elevator’s power ensures the car cannot move and the doors cannot operate during the rescue, which is crucial for your safety and the passengers’ safety. When power is cut to the elevator, the drive and control systems are de-energized, brakes stay engaged, and there’s no risk of a car shifting or the doors opening unexpectedly while you work. Relying on lighting or an emergency generator could still allow movement or door action, or provide a misleading sense of safety, so a full power disconnect to the elevator itself is the correct precaution.

The main idea is to completely isolate the elevator from electrical power before using the last resort method. Disconnecting the elevator’s power ensures the car cannot move and the doors cannot operate during the rescue, which is crucial for your safety and the passengers’ safety. When power is cut to the elevator, the drive and control systems are de-energized, brakes stay engaged, and there’s no risk of a car shifting or the doors opening unexpectedly while you work. Relying on lighting or an emergency generator could still allow movement or door action, or provide a misleading sense of safety, so a full power disconnect to the elevator itself is the correct precaution.