Scout's Toolbox Talks

Some equipment has more than one source of power — electrical, hydraulic, pneumatic, or mechanical. OSHA requires all energy sources to be isolated before work begins (1910.333(b)(2) and 1926.417).

Why It Matters:
Disconnecting the main breaker isn’t always enough. Hidden or stored energy can re-energize machinery unexpectedly, leading to shock, arc flash, or crushing injuries.

Key Points:

• Perform a full energy audit before beginning LOTO — check manuals, diagrams, and tags.
• Isolate each energy source individually: shut off valves, bleed pressure, and block moving parts.
• Apply locks and tags at every energy source — not just the control panel.
• Don’t forget stored energy — capacitors, flywheels, pressurized lines, or gravity can all pose risks.
• Communicate clearly with all affected workers about the full LOTO scope.

✅ One missed source is all it takes for a disaster.

Ask the Crew:

• Have we identified all sources of energy on this system?
• Are we locking out hydraulic, pneumatic, or mechanical energy too?

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