NFPA 70E

NFPA 70E – STANDARD FOR ELECTRICAL SAFETY IN THE WORKPLACE (USA) This standard defines five classes of HRC (Hazard Risk Category), which goes from  HRC 0 to HRC 4. HRC 4 or HRC Level 4 is the highest risk category with ATPV value more than 40cal/cm2. Consequently, protective clothing that withstands HRC 4 should provide…

IEC 61482

Protective clothing against thermal hazards of electric arc Norm: Draft IEC 61482-2 – Supersedes CLC/TS 50354:2003 (or ENV 50354) The garment must be used in combination with other clothing that ensures protection in compliance with EN 61482-1. No undergarments, such as undershirts and underwear, which melt under arc exposure are to be worn. The garment…

ASTM F2621

Standard Practice for Determining Response Characteristics and Design Integrity of Arc Rated Finished Products in an Electric Arc Exposure. Significance and Use. 5.1 This practice can be used for a range of purposes including incident replication, development of improved arc rated protective products, and the determination of the response characteristics and design integrity of new or…

ASTM 1959

 Standard Test Method for Determining the Arc Rating of Materials for Clothing This is the test method used to calculate quantitative results for fabrics relating to how they perform in an electric arc environment.  5.1 This test method is intended for the determination of the arc rating of a material, or a combination of materials….