Which materials should never be worn near energized equipment?

The correct choice emphasizes the use of materials that can pose a safety risk when near energized equipment. Acetate, nylon, polyester, and rayon are synthetic materials that can ignite and melt more easily than natural fibers. When exposed to high-energy arcs or electrical faults, these synthetic materials can create hazards, as they may catch fire or melt onto the skin, leading to severe injuries.

In contrast, natural fibers like cotton, wool, and silk have a higher ignition point and tend to burn at a much slower rate. Leather and rubber are typically used in safety gear due to their insulating properties and resistance to electrical hazards. Denim, while strong and durable, can still pose risks depending on the blend of synthetic fibers it contains. Hence, it is crucial to avoid synthetic blends around energized equipment to minimize potential injuries from electrical incidents.