What information must be on a warning tag attached to a locked-out switch?

A warning tag attached to a locked-out switch is crucial for maintaining safety during maintenance or repair activities. The information provided on this tag serves to inform personnel about the status of the equipment and to ensure that no one accidentally re-energizes the equipment while someone is working on it.

The correct choice, which includes the signature of the person who locked out the switch, is fundamental for several reasons. It creates accountability; personnel can see who is responsible for the lockout, promoting communication and safety awareness. This signature indicates that the individual is aware of the hazards and has a legitimate reason for the lockout. In case of an emergency or when the work is being performed, others can contact the individual who locked out the equipment, ensuring that everyone is informed and safe.

The other choices do not provide the critical information needed to ensure safety during a lockout situation. For instance, directions for removing the tag could lead to unauthorized access before allowing the actual work to conclude. Time to unlock the switch isn't necessary because the priority is on maintaining the safety lock until the operational needs are completely satisfied. The name of the nearest physician does not add relevance to the immediate issue of equipment safety and operations since it does not help manage the lockout itself.