Which three elements must be included in a Lockout/Tagout procedure?

• A. Identification of energy sources, lockout devices, and cautionary tags with authentication and date/time
• B. Identification of energy sources and lockout devices
• C. Lockout devices, inspection, and labeling
• D. Identification of energy sources, lockout devices, and protective equipment

Answer: (D)

Lockout/Tagout is about preventing the equipment from re-energizing while work is done. The three elements you must have are identifying all energy sources that could energize the equipment, using lockout devices to physically secure those sources in the off or de-energized state, and applying warning tags that convey the lockout status and include who applied it, when, and how to re-energize safely. This combination ensures you know what could energize the machine, you have a physical means to keep it from starting, and you clear, communicative warnings that prevent accidental re-energization. Protective equipment is important for worker safety, but it isn’t part of the isolation controls themselves.