Which of the following is crucial for ensuring safety when working with live wires?

Using proper grounding measures is essential for safety when working with live wires because it provides a path for electrical current to flow safely to the ground in the event of a fault. Grounding helps protect workers from potential electric shocks and reduces the risk of electrical fires or equipment damage. Establishing a grounding system ensures that any stray voltage or fault current is redirected safely, thereby minimizing hazards during operation.

Grounding also plays a crucial role in the overall safety strategy when working with live electrical systems, as it works in conjunction with other safety practices, such as using insulated tools and personal protective equipment like rubber gloves and boots. While these other options contribute to safety, grounding specifically addresses the inherent risks associated with live electricity in a direct way.