What is a tagout?

• A. A physical barrier
• B. A lock
• C. A tag indicating not to operate until removed
• D. A safety drill

Answer: (C)

Tagout is a warning tag placed on equipment that has been isolated from its energy source to indicate that it must not be operated until the tag is removed by an authorized person. It’s the informational part of the energy-control process, telling everyone that work is in progress and who placed the tag and why. Unlike a physical barrier, a tag alone doesn’t mechanically prevent operation, which is why it’s typically used with proper isolation devices and, where required, a lock to ensure the equipment cannot be energized. The tag stays in place until the work is finished and the system is verified safe, serving as a clear, visible notice not to operate the equipment.