Not all energy is electrical. To properly lock out equipment, you need to identify all hazardous energy sources — not just the obvious ones.
Why It Matters:
Injuries happen when workers only isolate the main power source but ignore other energy forms. A pressurized line, stored spring tension, or thermal energy can still cause harm even if a breaker is turned off. OSHA’s LOTO standard (29 CFR 1910.147) applies to all energy types.
Key Points:
- Electrical: Main power supply, backup power, or capacitors.
- Mechanical: Moving parts, flywheels, or spring-loaded components.
- Hydraulic & Pneumatic: Pressurized fluid or air systems that can suddenly release energy.
- Thermal: Heated surfaces, steam, or chemical reactions.
- Chemical: Stored or reactive substances under pressure.
- Gravity: Suspended parts or loads that could fall if not blocked or pinned.
✅ Lock out all forms of energy — not just electricity.
Ask the Crew:
- What types of energy are present in our equipment today?
- Have we blocked or released stored energy sources?
- Are our lockout procedures accounting for more than just the power switch?