The NFPA 70E standard discusses eliminating step potential. This can be accomplished though the use of rubber matting or dielectric boots. However, this is only for shock protection. For arc flash protection, NFPA 70E 130.7(C)(d) states, \"Heavy duty leather work shoes provide some arc flash protection to the feet and shall be used in all tasks in HRC 2 and higher and in all exposures greater than 4 cal/cm(2).\"