Which statement best describes the location of the E-stop’s power cut?

Which statement best describes the location of the E-stop’s power cut?

• A. Removes power to the trolley only.
• B. Removes power to the entire bridge.
• C. Removes power to the hoists only.
• D. Removes power to the entire crane.

Answer: (D)

An emergency stop is designed to halt all crane motion immediately by removing power to all controlled systems. When the E-stop is engaged, the main power to the crane’s drives and hoist is cut, so nothing on the bridge, trolley, or hoist can move. This complete power cut is essential for stopping any unsafe condition quickly and preventing further movement with the load. If power were cut only to one part—such as just the trolley, just the hoist, or just the bridge—other subsystems could still operate, which would not safely stop all motion. After an E-stop, the switch must be reset and the crane inspected before it can be operated again.

An emergency stop is designed to halt all crane motion immediately by removing power to all controlled systems. When the E-stop is engaged, the main power to the crane’s drives and hoist is cut, so nothing on the bridge, trolley, or hoist can move. This complete power cut is essential for stopping any unsafe condition quickly and preventing further movement with the load. If power were cut only to one part—such as just the trolley, just the hoist, or just the bridge—other subsystems could still operate, which would not safely stop all motion. After an E-stop, the switch must be reset and the crane inspected before it can be operated again.