Which step involves isolating the machine or equipment?

The step that involves isolating the machine or equipment is the one that specifically focuses on ensuring that the equipment is no longer connected to its energy sources. This action is crucial to preventing unintended energization of the equipment during maintenance or repair work. During this step, all energy sources—whether mechanical, electrical, hydraulic, or pneumatic—are identified and disconnected.

Isolating the machine ensures that no hazardous energy can flow into it, thereby protecting workers from potential accidents. It sets the stage for subsequent safety measures, such as the application of lockout/tagout devices, which are used to secure the equipment in a way that cannot be accidentally turned back on until it’s safe to do so. This sequence is vital in maintaining a safe work environment and is fundamental to effective lockout/tagout procedures, thereby emphasizing the importance of this step in the overall safety process.