Designed to protect workers when they are servicing or repairing equipment
- When any equipment is being serviced, repaired, adjusted, altered or tested, the equipment must be de-energized, locked-out and tagged to render it inoperable
- Applies to equipment in the vicinity of equipment being serviced that would pose a hazard should it accidentally become energized. e.g. agitators must be de-energized before entering a mud tank