With the revised OSHA 29 CFR 1910.269 standard slated to soon be released, the last utility companies holding out on moving to arc-rated clothing will soon be compelled to do so as a matter of law. The new standard is likely to have the same language as the National Electrical Safety Code (NESC) and will require arc flash calculations for both primary and secondary voltages. NESC 2007 excluded secondary voltages, but the 2012 edition includes a requirement to perform arc flash calculations and does not discriminate against primary or secondary voltages. To follow calculations per the updated 1910.269 standard, worker apparel will be required to have an arc rating equivalent to the hazard. Most of the PPE will be 4, 8, 12, 20, 40 and 60 cal/cm² as described in the NESC.