What is an 'e-stop' and when should it be used?

• A. A device to measure energy consumption.
• B. Emergency stop; used to quickly halt powered equipment in danger.
• C. A device to reset stage lighting.
• D. A device to adjust tempo of music.

Answer: (B)

An e-stop is an emergency stop device that immediately cuts power to powered equipment to prevent injury or damage. It should be used any time there’s imminent danger or a fault or unsafe movement in the system. When you hit it, you’re stopping energy quickly to minimize harm, not performing a routine shutdown. After using it, follow the proper restart procedure and only re-energize when the area is safe and the cause of the issue has been addressed. It’s not for measuring energy, resetting stage lighting, or adjusting tempo—those are routine controls, while the e-stop is for urgent safety shutdown.