Which of the following best describes a “lockout” procedure?

The term "lockout" in an electrical safety context refers specifically to the use of devices, such as locks, to secure the energy isolation of equipment and prevent it from being accidentally energized during maintenance or repair activities. This procedure is critical to ensuring the safety of workers by preventing unexpected startup of machinery that could cause injury.

When a lockout procedure is correctly implemented, it typically involves turning off equipment and then physically locking the energy isolation device (such as a circuit breaker or a valve) in the off position. This step ensures that only authorized personnel can remove the lock and restore power, thereby significantly enhancing workplace safety.

The other options do not accurately capture the essence of a lockout procedure. Reducing energy consumption does not address the safety of personnel during maintenance. Tagging electrical wires, while important, pertains more to identification rather than the prevention aspect intrinsic to lockout procedures. Documenting maintenance schedules is necessary for overall management but does not involve the physical control of energy sources like a lockout does. Thus, the definition that focuses on the use of a lock to prevent equipment from being energized is indeed the best descriptor for a lockout procedure.