If a device cannot be physically locked, under what condition can you use a tag-out only procedure?

Using a tag-out only procedure is typically applied in situations where a device cannot be physically locked out, and this must always follow appropriate safety protocols. The correct choice indicates that shop supervisor approval is required when justified, meaning that there should be a valid reason for bypassing the physical lock-out procedure. This ensures that safety is maintained and that operations are conducted under proper oversight.

The need for supervisor approval emphasizes accountability and safety management within the workplace. It also reflects the importance of assessing the specific situation to determine if tag-out procedures are adequate, particularly when they are required instead of the more secure lock-out procedures.

Engaging an additional employee or ensuring that maintenance time is limited can be important safety factors, but these conditions alone do not justify the use of a tag-out procedure without supervisor approval. Additionally, performing maintenance outside of normal operating hours does not inherently justify the use of tag-out procedures either, as safety protocols must be consistently upheld regardless of the timing of maintenance activities.