In Episode 30 of “EC&M On Air,” Ellen Parson, editor-in-chief of EC&M, highlights some of the most popular technical content we’ve been running recently, but this time brought to you in audio-only form. In case you missed it, this content was originally brought to you in our EC&M Asks Q&A video series. This week, we’re featuring subject matter expert Tommy Northcott, who addresses some of our readers’ most pressing questions about arc flash hazards and personal protective equipment (PPE), including whether it’s ever safe to work above 40 cal/cm2, how to choose the right PPE for your specific situation, how to determine the required PPE when electrical equipment is arc rated or arc resistant, and arc flash hazards for systems less than 480V.