Common LOTO Mistakes Toolbox Talk

Lock out tag out mistakes often happen when the job feels quick, familiar, or low risk. A worker may shut off a machine, place one lock, skip verification, or assume stored energy is gone. That is when equipment can start, move, drop, shock, burn, pressurize, or release energy without warning.

This talk focuses on common LOTO mistakes crews need to watch for during service, repair, cleaning, adjustment, troubleshooting, and jam clearing. The goal is to slow down, follow the full procedure, and make sure every energy source is controlled before anyone enters the danger area.

Why This Matters

• Most LOTO failures come from missed steps, poor communication, or assumptions.
• Turning equipment off is not the same as isolating and locking out hazardous energy.
• Stored energy can remain in lines, cylinders, springs, capacitors, raised parts, hot surfaces, and suspended loads.
• One worker’s shortcut can put the whole crew or another trade at risk.
• Following the procedure every time helps prevent injuries during routine work and emergency repairs.

Common Hazards

• Relying on a stop button, control switch, e-stop, or operator screen instead of locking out the energy source.
• Locking out the wrong breaker, valve, disconnect, plug, or control point.
• Missing secondary energy sources such as batteries, generators, air lines, hydraulic lines, or temporary power.
• Skipping stored energy release, including bleeding pressure, lowering raised parts, blocking equipment, or discharging capacitors.
• Not verifying zero energy before starting work.
• Using a tag without a lock when a physical lockout device is required.
• Removing another worker’s lock or working under someone else’s lock without proper group lockout protection.
• A crew restarting equipment after a quick repair while tools, guards, covers, or workers are still in the danger area.

Safety Checklist

Before Work Begins

• Review the equipment-specific lock out tag out procedure before starting the task.
• Identify all energy sources, including electrical, hydraulic, pneumatic, mechanical, gravity, thermal, chemical, and stored energy.
• Notify affected workers before shutdown, isolation, lockout, or tagout begins.
• Shut down equipment using normal controls before isolating energy.
• Apply locks and tags at the correct energy-isolating points.
• Use the right lockout device for the breaker, valve, disconnect, plug, switch, hose, or other control point.
• Release, bleed, block, pin, lower, cool, discharge, or restrain stored energy.
• Verify zero energy before placing hands, tools, or body parts near the hazard.

During Work

• Keep locks and tags in place until the task is complete and the area is ready for restart.
• Do not bypass a step because the repair is quick or the equipment looks inactive.
• Stop and reassess if a new hose, wire, valve, battery, pipe, panel, or control is found.
• Use group lockout procedures when more than one authorized worker is exposed.
• Do not remove, move, cover, or ignore another worker’s lock or tag.
• Communicate LOTO status during breaks, shift changes, testing, and handoffs.
• Before restart, clear tools and materials, reinstall guards, account for workers, and notify affected crews.

Crew Talking Points

• What LOTO mistakes are most likely on today’s task?
• Are there any hidden or secondary energy sources we could miss?
• How will stored energy be controlled before work begins?
• Who needs to be notified before shutdown and before restart?
• How will we verify zero energy before anyone starts work?
• Does anyone see a step that could be skipped by mistake or a hazard that needs to be checked?

Stop Work If

• The correct lock out tag out procedure is missing, unclear, or does not match the equipment.
• Any energy source has not been identified, isolated, locked, tagged, or controlled.
• Stored energy has not been released, blocked, discharged, cooled, or restrained.
• Zero energy has not been verified.
• Someone tries to work under another worker’s lock without approved group lockout protection.
• Locks or tags are missing, damaged, unreadable, removed early, or placed on the wrong control point.

Final Reminder

LOTO mistakes usually come from rushing or assuming. Follow the full procedure, control every energy source, verify zero energy, and speak up before a shortcut becomes an injury.