The National Electrical Safety Code® (NESC) covers utility workers during the installation, operation or maintenance of electric supply and communication lines and associated equipment. Updated in 2012, the 2007 version added rules that mandate and cover the use of arc rated FR clothing.
Since January 1, 2009, employers have been required to perform a hazard risk analysis for employees that work on or near energized parts or equipment. If the assessment determines that energies available are over 2 cal/cm2, then protective clothing (or clothing systems) shall be worn that has an arc rating equal to or greater than the anticipated level of energy.
The NESC is revised every five years and the next version of NESC is expected to be published August 1, 2016.