If a power source can't be locked out, what should the authorized employee do?

When a power source cannot be locked out, using tagout alone can serve as an alternative safety measure. The tagout procedure involves placing a tag on the energy-isolating device to indicate that maintenance or servicing is being performed, and it serves as a warning not to operate the equipment while work is in progress.

It's crucial that this process is thorough and that all employees understand the meaning of the tag. Tagout is considered a less effective method than lockout, but it can be properly implemented if lockout is not an option. Certain safety protocols must be followed to ensure the work is performed safely, such as notifying affected employees and following specific procedures to manage any residual hazards.

Other options listed do not provide a viable solution to ensure safety when a lockout is impractical. Therefore, utilizing tagout when necessary allows for safe practices in situations where locking out a power source is not feasible.