What is the minimum arc rating for clothing under PPE Category 1?

The minimum arc rating for clothing categorized under PPE Category 1 is established to help protect workers from electrical arc flash hazards. Specifically, for this category, the standard requires a minimum arc rating of 4 cal/cm². This rating is designed to provide a degree of thermal protection against the heat generated by an electrical arc, reducing the likelihood of severe burns during a potential electrical incident.

It's essential to adhere to these standards, as they are derived from safety practices in electrical work and serve to enhance the safety of personnel working in environments where arc flash hazards may exist. The specified arc rating ensures that the clothing worn offers a baseline level of protection for the wearer against thermal hazards associated with electrical arcs.