Scout's Toolbox Talks

When to Use Lockout/Tagout

Toolbox Talk:

Lockout/Tagout for Electrical Systems

June 27, 2025

Electrical systems require special attention when applying Lockout/Tagout (LOTO) procedures. Electricity is invisible, silent — and potentially deadly if not properly isolated.

Why It Matters:

According to OSHA standards 1910.333 and 1926.417, electrical circuits must be de-energized and locked out before any work is performed. Even momentary contact with a live conductor can result in serious injury or death. Proper LOTO is the only guaranteed method to ensure equipment is truly safe.

Key Points:

  • Always verify the system is de-energized using appropriate voltage testers before beginning work.
  • Turn off breakers, disconnect switches, or control panels, then apply a personal lock and tag.
  • Control circuits (like push-button stops) do not disconnect power — go to the source.
  • Place lockout devices on each source of electrical energy, including panels, subpanels, or MCCs.
  • Post-lockout, attempt to turn on the equipment to confirm it’s safely isolated (test and try).
  • Wear appropriate PPE, such as rubber-insulated gloves and arc-rated clothing, during the process.

✅ Lock it out, test it dead — every time.

Ask the Crew:

  • Are we locking out power at the correct source, not just the control circuit?
  • Do we test the equipment to verify it’s de-energized before starting?
  • Are our LOTO procedures specific to electrical systems and up to OSHA standards?