What does Lock Out mean in safety procedures?

In safety procedures, "Lock Out" refers specifically to the practice of applying a physical lock to power sources, ensuring that machines and equipment cannot be accidentally energized while they are being serviced or maintained. This procedure is a critical part of lockout/tagout (LOTO) protocols, which are designed to protect workers from the unexpected energization of machinery.

When a lock is applied to an energy-isolating device, it acts as a barrier, preventing anyone from turning the equipment back on until the lock is removed by the technician who is working on it. This practice provides a reliable way to safeguard workers by ensuring that they can perform their tasks safely without fear of an accidental start-up. The locking mechanism serves as a clear visual cue to all personnel that the machine is under maintenance, and it helps in reinforcing accountability among different team members.

The other options revolve around aspects of safety but do not encapsulate the full meaning of "Lock Out." Disabling electrical circuits may be a part of the procedure, as would tagging equipment or hiding it, but these activities alone do not guarantee the same level of safety that a physical lock provides. Locking out power sources is a vital, systematic approach that is specifically designed to prevent accidents and injuries in the workplace