Which system is used to secure power?

Which system is used to secure power?

• A. Isolation tagging
• B. Lockout/tagout
• C. Barrier control
• D. Zone control

Answer: (B)

Lockout/tagout is the method used to prevent unexpected energization of equipment while maintenance or repair is being done. It works by isolating the energy source and then applying a physical lock to the energy-control device, such as a switch or valve. A tag is also attached to communicate who is performing the work and that the equipment must not be energized. This combination gives a real barrier to re-energizing the system and ensures only the person who applied the lock can remove it, after the work is finished and verified. This approach covers electrical, hydraulic, and mechanical energy, making it the standard to secure power and protect people from shocks, burns, or moving parts. The other terms don’t fit because they describe different safety concepts: one can imply merely tagging an isolated state without a physical lock, which doesn’t guarantee the equipment won’t be energized; barrier control focuses on keeping people out of hazardous areas with physical barriers, not on stopping energy flow; zone control relates to organizing areas for safety or firefighting operations, not securing energy sources.

Lockout/tagout is the method used to prevent unexpected energization of equipment while maintenance or repair is being done. It works by isolating the energy source and then applying a physical lock to the energy-control device, such as a switch or valve. A tag is also attached to communicate who is performing the work and that the equipment must not be energized. This combination gives a real barrier to re-energizing the system and ensures only the person who applied the lock can remove it, after the work is finished and verified. This approach covers electrical, hydraulic, and mechanical energy, making it the standard to secure power and protect people from shocks, burns, or moving parts.

The other terms don’t fit because they describe different safety concepts: one can imply merely tagging an isolated state without a physical lock, which doesn’t guarantee the equipment won’t be energized; barrier control focuses on keeping people out of hazardous areas with physical barriers, not on stopping energy flow; zone control relates to organizing areas for safety or firefighting operations, not securing energy sources.