Why is it crucial to keep circuits de-energized while working on them?

Keeping circuits de-energized while working on them is crucial primarily to reduce the risk of electrical shock or injury. Electrical circuits can carry dangerous voltage levels that pose serious safety hazards to personnel working on or near the equipment. When a circuit is energized, there exists a clear possibility of accidental contact with live parts, which can result in severe electrical shocks, burns, or even fatalities.

By de-energizing the circuits, technicians can perform their tasks safely, knowing that the risk of encountering live electrical current is eliminated. This practice is foundational in ensuring a safe working environment and adheres to electrical safety standards and regulations designed to protect workers from the inherent dangers associated with electrical work.