Lock Out Tag Out
Lockout Tagout applies to General Industry, although in the field of construction there has been discussion of developing a similar standard. The rule applies to machinery that can start by itself or maybe turned on by other co-workers, or even by the worker who is on the machine in question. The key element is that the rule applies to any worker who is exposed to the hazard of the release of energy.
The regulation specifically excludes hot tap operations and equipment that is connected by a cord and plug IF that plug can be pulled out of the wall and in control of the worker while the maintenance is being performed.