According to the Occupational Health & Safety Association (OSHA), 5 to 10 arc flash events occur per day in the U.S., with most of these resulting in injuries and some being deadly. Beyond being a severe hazard to personnel, arcing faults also result in significant economic losses due to electrical fire damage to equipment and interruption of processes. The most common cause of arc faults is insulation failure. They can also be caused by loose connections, insufficient mechanical dimensioning, equipment malfunction, contamination or degradation of insulation, and animals. An arc flash is the light and heat produced as part of an arc fault. OSHA estimates that over two-thirds of all arc flash incidents are the result of worker error , for example due to entering a live panel or field, careless use of tools, or leaving a temporary earth connected. In detail, an arc fault is a short circuit conducted through ionized air (plasma) between one live part and ground or between two ...