What is the proper sequence of steps for a safe lockout/tagout procedure?

• A. Identify energy sources, lock out, isolate, tag out, perform service, verify energy, restore energy, and verify functioning.
• B. Isolate and lock out, tag out, verify de-energization, perform service, restore energy.
• C. Verify de-energization, identify energy sources, isolate, lock out, tag out, perform service, restore energy.
• D. Identify energy sources, isolate them, lock out, tag out, verify de-energization, perform service, remove locks/tags, restore energy, and verify functioning.

Answer: (D)

Lockout/tagout works by progressively creating a safe, energy-free state before anyone works on a machine. Start by identifying all energy sources for the equipment so you know what must be controlled. Then isolate those sources to physically prevent energy from reaching the machine. Apply the lockout devices (and attach the corresponding tags) to deter anyone from reenergizing the equipment. After that, verify de-energization to confirm that all energy has been removed or blocked. With the system confirmed safe, perform the service or maintenance. Once work is complete and you’ve verified the equipment can operate safely, remove the locks and tags, restore power, and verify that normal functioning resumes.