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Many arc flash burn injuries occur when the arc ignites flammable clothing, rather than directly from the arc itself. What is an Arc Flash?  An electric arc is a powerful electrical discharge that generates a burst of hot gas, reaching temperatures upwards of 35,000 °F (19,400 °C). This intense heat is almost four times hotter than the surface of the sun. The energy released during an electric arc quickly heats and vaporizes the metal carrying the current, creating an explosive arc bl …