What is a lockout/tagout procedure and in what scenario is it used in security contexts?

• A. A sign-in process for contractors.
• B. A process to safely de-energize equipment during maintenance to prevent injuries or accidental startup.
• C. A method to lock doors during an emergency.
• D. A process to tag employees for overtime.

Answer: (B)

Lockout/tagout is a safety procedure used to prevent unexpected energization or startup of equipment during maintenance or repair. It combines two elements: lockout, which places a physical lock on energy sources so that the equipment cannot be energized, and tagout, which attaches a warning tag indicating who is authorized and that the machine must not be energized. This protects workers from injuries such as electrical shock, mechanical movement, or other hazardous energy release while they’re servicing equipment. In security contexts, it’s applied whenever technicians work on security systems or related equipment that could start unexpectedly—things like electrical panels, power supplies, alarm or access-control servers, generators, or HVAC components that feed critical security systems. The procedure typically follows steps: identify all energy sources, notify affected personnel, shut down equipment, isolate energy sources, apply lockout devices and tags, verify de-energization, perform maintenance, ensure the area is clear, then remove devices and restore energy once work is finished. The goal is to prevent injuries and accidental startup. The other options describe access control, emergency door locking, or overtime tagging, which do not address preventing energy release during maintenance.