Group Lockout Procedures Toolbox Talk

Group lockout is used when more than one authorized worker is servicing, repairing, cleaning, adjusting, or troubleshooting the same equipment or system. When multiple people depend on the same lockout, confusion can happen fast. If one person removes a lock too early or assumes someone else is protected, workers can be exposed to unexpected startup, movement, pressure, heat, electricity, or stored energy.

This talk focuses on how group lockout procedures keep each worker personally protected. The crew needs to know how locks, tags, hasps, lock boxes, keys, and handoffs are controlled so no one works under another person’s protection without being accounted for.

Why This Matters

• Every authorized worker must have personal lockout protection when exposed to hazardous energy.
• Group lockout prevents one person from re-energizing equipment while others are still working.
• A lock box or multi-lock hasp helps control multiple isolation points and multiple workers.
• Clear responsibility prevents confusion between trades, crews, supervisors, and shifts.
• Group procedures make sure all workers are clear before testing or returning equipment to service.

Common Hazards

• One worker assuming another worker’s lock protects the whole crew.
• Failing to place a personal lock on the group lock box or hasp.
• Keys for isolation locks not being secured inside the lock box.
• Removing a group lock before all workers have removed their personal locks.
• Not updating the lockout when another trade joins the work.
• Testing or jogging equipment without clearing and notifying every worker in the group.
• Shift changes where incoming workers do not apply their own locks before outgoing workers remove theirs.
• A contractor, vendor, inspector, or maintenance tech entering the work area without being added to the group lockout.

Safety Checklist

Before Work Begins

• Review the equipment-specific lock out tag out procedure with all authorized workers involved.
• Identify every energy source and isolation point before shutdown begins.
• Assign one authorized person to coordinate the group lockout.
• Shut down, isolate, lock, tag, and control stored energy at each required point.
• Place the keys for the isolation locks inside the group lock box, if a lock box is used.
• Have each authorized worker place their personal lock and tag on the lock box or hasp before starting work.
• Verify zero energy and communicate the verification results to the group.
• Confirm how testing, breaks, shift changes, and crew handoffs will be handled.

During Work

• Keep personal locks in place while you are exposed to hazardous energy.
• Do not work under another worker’s lock unless the approved group lockout procedure protects you.
• Stop new workers from entering the task until they apply their own lock and understand the hazards.
• Do not test, jog, or re-energize equipment until all workers are notified, clear, and accounted for.
• Reapply group lockout protection immediately after testing if work must continue.
• Use a controlled handoff when workers leave, return, or change shifts.
• Before final re-energization, confirm every personal lock is removed, tools are cleared, guards are replaced, and workers are out of the danger area.

Crew Talking Points

• Who is coordinating the group lockout today?
• Where are the isolation points, lock box, or hasps located?
• Has every authorized worker placed their personal lock and tag before starting work?
• How will we add workers or trades who join the task later?
• What is the plan for testing, breaks, and shift changes?
• Does anyone have a question or concern about who is protected under the group lockout or how the handoff will work?

Stop Work If

• An authorized worker is exposed without their personal lock applied.
• The lock box, hasp, isolation locks, or keys are not controlled.
• There is confusion about who is coordinating the group lockout.
• A new worker or trade joins the task without being added to the group lockout.
• Testing or re-energization is planned but all workers have not been notified and cleared.
• A shift change happens without a proper lockout handoff.

Final Reminder

Group lockout only works when every exposed worker has personal control. Add your own lock, know the procedure, and never assume someone else’s lock protects you.