Which steps are involved in a proper lockout/tagout or equipment isolation procedure?

• A. Identify the energy source, isolate and lock it, verify zero energy, and restore safely after verification.
• B. Turn off device and walk away.
• C. Disable power in IT.
• D. Only inform supervisor.

Answer: (A)

Lockout/tagout focuses on controlling hazardous energy so a worker can perform service or repair safely. The steps involve first identifying all energy sources that could power the equipment, including electrical, mechanical, hydraulic, pneumatic, chemical, thermal, and stored energy. Then you isolate those energy sources and secure them with lockout devices, while tags communicate who is responsible and that the equipment must not be energized. Verifying zero energy is crucial because stored or residual energy can cause unexpected startup or energy release even after isolation. This verification confirms that the equipment cannot re-energize and that it’s safe to proceed. Finally, once maintenance is complete and it’s verified as safe, you restore the equipment to service in a controlled way and remove the locks only after ensuring the area is clear and everyone is informed.

The other options fail because they skip essential actions. Merely turning off a device and leaving does not prevent others from re-energizing the equipment, which leaves a serious risk. Focusing only on IT power ignores the broader range of energy sources that could energize equipment in the field. Simply informing a supervisor does not physically isolate energy or verify that the system is safe to work on.