Scout's Toolbox Talks

When to Use Lockout/Tagout

Toolbox Talk:

Types of Hazardous Energy That Require Lockout/Tagout

June 27, 2025

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?