Arc-flash-rated and flame-resistant gloves are worn when performing maintenance work, de-energizing electrical panels, and when working on hot engines and machinery. Arc-flash-rated gloves meet NFPA 70E standards to protect workers from burns and injuries caused by electrical arc flash. They are flame-resistant and are hazard risk category (HRC)-rated to indicate the level of burn protection. HRC ratings with higher numbers (HRC 4) provide more protection than those with lower numbers (HRC 1). While all arc-flash-rated gloves are flame-resistant, not all flame-resistant gloves are arc flash rated.