In which scenario would Lockout/Tagout not be necessary?

Lockout/Tagout (LOTO) is a critical safety procedure used to prevent accidental machine start-up during maintenance or servicing. In the context of the scenarios presented, the situation in which LOTO would not be necessary is when equipment is not in use.

When equipment is powered down and not in operation, there is typically no risk of unintended energization. Therefore, there is no need to apply lockout/tagout procedures since the equipment poses no hazards to workers at that time. The purpose of LOTO is to protect workers from the dangers associated with equipment that is about to be serviced or maintained, so if the equipment is already inactive, these additional precautions are not required.

In contrast, maintenance on energized equipment, using a tool under supervision, or conducting a safety inspection generally involve potential hazards where machines could unexpectedly start up or release stored energy, thus necessitating the use of LOTO procedures to ensure worker safety.