What does lockout/tagout (LOTO) refer to?

Lockout/tagout (LOTO) refers to a safety procedure that is crucial for ensuring that machines and equipment are properly shut off and not able to be started up again until maintenance or servicing is completed. This procedure typically involves placing a lock and tag on the energy-isolating devices of machinery, ensuring that workers cannot inadvertently operate the machinery while someone is performing maintenance.

This method is vital for protecting workers from the unexpected release of hazardous energy, such as electrical, mechanical, hydraulic, or pneumatic energy, which could cause injury or even death. By enforcing a lockout/tagout system, employers can establish a controlled environment that significantly reduces risks during maintenance activities.

The other options do not depict the procedures and aims of LOTO accurately. Option A suggests that equipment should be powered on during maintenance, which contradicts the logic of LOTO focused on safety through shutting off equipment. Option C refers to regulations for testing devices, while testing and maintaining are two different processes. Lastly, option D mentions sealing equipment, which does not relate to the core function of LOTO, which primarily involves ensuring machines are de-energized and thus safe for maintenance tasks.