In what situation is it crucial to de-energize equipment?

De-energizing equipment is critically important before conducting maintenance or repairs, as it directly addresses the risk of electric shock. This action ensures that all electrical circuits are completely powered down and eliminates the potential for accidental contact with live circuits, which could result in serious injury or fatality.

When workers approach equipment to observe, inspect, or service it, they may inadvertently touch components that could be energized. By de-energizing the equipment, the work environment becomes significantly safer, allowing technicians to proceed without the constant, looming threat of electric shock from live parts.

Other situations mentioned, such as performing routine checks, attending to malfunctioning equipment, or resetting machinery after a power outage, do not necessarily mandate de-energization. While it is always a good safety practice to assess the situation before handling any equipment, the first scenario stands out as essential due to the direct and immediate risks involved with conducting maintenance.