In addition to nylon, what other clothing material is prohibited during potential electric arc or flash situations?

The correct answer is polyester, which is prohibited in environments where there is a risk of electric arc or flash. Polyester is a synthetic material that has flammable properties, meaning that in the event of an electric arc, it can ignite and lead to severe burns. This type of damage occurs because synthetic fabrics like polyester can melt onto the skin, exacerbating the injuries sustained during an electrical incident.

When working as a lineman or in any electrical environment where arc flash is a concern, it is vital to wear clothing made of materials that have inherent flame-resistant characteristics. Unlike polyester, other materials such as cotton or specialized arc-rated fabrics are designed to withstand the high temperatures and prevent ignition, thereby providing better protection.

Understanding which materials are safe to wear in potentially hazardous situations is crucial for the safety and well-being of the worker. This is why the prohibition of polyester and similar fabrics is a standard safety measure in the industry.