# Group lockout and the group lockbox > Follow a group lockbox from isolation keys to personal locks, verification, shift changes, and release in this animated lockout/tagout explainer. Canonical page: https://datacenterlabeling.com/videos/group-lockbox Educational examples for safety professionals. Actual work requires trained personnel, the employer’s equipment-specific energy-control procedures, and the manufacturer’s instructions. Watching does not confer authorization or electrical qualification. Follow the relationship between the isolated equipment, the isolation keys, and each worker’s personal lock. Use the animation to discuss group coordination and individual protection during maintenance. Watch: https://www.youtube.com/watch?v=1HU8hJ_oq6o Collection: https://datacenterlabeling.com/videos/lockout-tagout-data-centers ## Transcript ### 0:00 — One job, several people A cooling-system maintenance job brings together an electrical technician, a mechanical technician, and a contractor. The equipment has several isolation points. Applying every person's lock at every point could become cumbersome. A group lockbox can organize the work, but the box alone is not the protection. The protection comes from a complete procedure that connects the isolated equipment to each participating employee's personal control. In this episode, we follow that connection from the field devices to the last personal lock. Our example is a fictional machinery-maintenance job; any electrical exposure also requires the applicable electrical work practices and qualified personnel. ### 0:46 — Assign coordination before isolation Start by defining the equipment, work boundary, participating crafts, and energy-control procedure. The group arrangement must assign responsibility for coordination and account for each person's exposure. The primary authorized employee needs a clear view of which isolation points protect which parts of the job. A contractor arriving later cannot be assumed to share the same procedures or terminology. Before work, the on-site and outside employers exchange their lockout information and resolve how the combined job will be controlled. A pre-job briefing should leave everyone able to identify the protected equipment, the responsible coordinator, and the action to take if conditions change. ### 1:31 — Establish the equipment isolation The designated personnel carry out the equipment procedure: orderly shutdown, physical isolation, securing the isolation devices, and control of stored energy. Verification must demonstrate that the planned isolation is effective for the work. Electrical verification is performed by a qualified person using the required safe work practices and suitable test equipment. The panel shown here is a conceptual example, not an isolation plan for a real installation. A real job needs an exact mapping between equipment, points, locks, and the work being protected. If one point cannot be identified or secured as planned, the team resolves that problem before treating the group arrangement as ready. ### 2:17 — Capture the isolation keys Now follow the keys. The locks at the isolation points are secured. Their keys are placed into the designated group lockbox under the established procedure. The box is closed using its designed locking arrangement. This is the critical mechanical link: without access to those keys, the isolation locks cannot be routinely removed. The visible box number should match the job's records and briefing. The animation hides the front wall only to show the keys inside. Real installations must use the approved box and key-control method, including control of any duplicate or emergency keys that could otherwise undermine the intended protection. ### 3:02 — Apply personal protection before joining Before entering the servicing activity, each participating authorized employee applies a personal lockout or tagout device to the approved group mechanism. In our lock-based example, each person closes a personal padlock on the box and retains their own key under the employer's program. A supervisor's lock is not a substitute for all the workers' individual protection. A name on a permit or a signature on a roster is useful coordination information, but it is not the same mechanical control. Notice that the keys inside the box are for the isolation locks. The personal-padlock keys stay under the individual employees' control. ### 3:44 — Understand the right to verify There is an important distinction in OSHA's July 2023 group-lockout interpretation. When a primary authorized employee verifies the isolation, OSHA does not require every other authorized employee to perform a separate verification in that group arrangement. However, participating employees must be informed of their right to verify and must be allowed to do so. An employee choosing personal verification does it after attaching their personal device to the lockbox and before servicing. The site's procedure may require additional checks. This distinction does not authorize an unqualified person to conduct electrical testing. The verification method must remain appropriate to the hazard and the person's qualification. ### 4:32 — Protect changes in personnel and scope A group job rarely stays perfectly static. People arrive, finish their assignments, change shifts, or discover that the work needs to expand. The procedure must preserve protection through those transitions. A shift change must not leave an unprotected gap between outgoing and incoming personnel. The team also needs to know whether someone remains exposed even after their immediate task is finished. If the scope changes to another section or another source becomes relevant, stop and reassess the boundary. Adding a name to the existing paperwork cannot extend an isolation that does not physically protect the new work. ### 5:14 — The last lock is a meaningful barrier As employees complete their work and leave the exposure, they remove their personal devices under the procedure. Watch what happens when only one lock remains. The box still prevents access to the isolation keys. The remaining worker's protection is not less important because everyone else is ready to leave. Never treat a lock that delays startup as an inconvenience to work around. If the employee who applied a device is unavailable, removal is an exceptional action governed by the employer's documented process and the applicable standard. It is not an informal supervisor decision or a normal step in this demonstration. ### 5:56 — Release the job, then restore service Once personal protection has been properly released, the coordinator still has work to do. The job must meet the applicable checks for equipment condition, tools, guards, personnel, notifications, and controlled restoration. Opening the box is not itself permission to energize. The designated people recover the isolation keys and remove isolation devices according to the approved process. Operations then restores equipment in the planned sequence. For a data center, confirm that capacity and redundancy are returning to the intended configuration. The lesson is the whole chain: identify the job, verify isolation, secure the keys, protect each person, manage changes, and deliberately release the work. ## Episode reference links - [OSHA eTool - Group lockout/tagout procedures](https://www.osha.gov/etools/lockout-tagout/hot-topics/group-lockout-tagout/procedures) - [OSHA eTool - Required content of energy-control procedures](https://www.osha.gov/etools/lockout-tagout/tutorial/energy-control-procedures/required-content) - [OSHA eTool - Application of energy control](https://www.osha.gov/etools/lockout-tagout/tutorial/application-energy-control) - [OSHA 29 CFR 1910.333 - Selection and use of work practices](https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.333) - [Master Lock 498A - Group lockbox operating principle](https://www.masterlock.com/products/product/498A) - [OSHA Group Lockout/Tagout interpretation, July 27, 2023](https://www.osha.gov/laws-regs/standardinterpretations/2023-07-27) - [OSHA eTool - Shift and personnel changes](https://www.osha.gov/etools/lockout-tagout/tutorial/shift-personnel-changes) - [OSHA eTool - Outside personnel](https://www.osha.gov/etools/lockout-tagout/tutorial/outside-personnel) - [OSHA eTool - Release from lockout/tagout](https://www.osha.gov/etools/lockout-tagout/tutorial/release-from-lockout-tagout) Production: original 3D animation with AI-assisted scripting and synthetic English narration. Examples are fictional and brand-neutral.