Request a copy of the most recent assessment of arc flash hazards. Determine the frequency at which the assessments have been conducted, e.g., when a significant electrical power distribution change occurred. Review the qualifications of the person that conducted the assessment, i.e., was he/she a licensed electrical engineer or the equivalent? Was the assessment conducted in accordance with the IEEE (Institute of Electrical and Electronics Engineers) Standard 1584 "IEEE Guide for Performing Arc-Flash Hazard Calculations"?