An electric arc burst is the arc of light and heat that is created when energy is released between a live conductor and another conductor or ground. The energy released during an electric arc flash heats the air to extreme temperatures, up to almost 20 000°C. At these high temperatures, items within one metre (3 feet) such as clothing and skin will catch fire, melt or evaporate. In addition, a burst of electric arc creates an explosion; heated air suddenly expands and creates a powerful pressure wave (an explosion).
Damage or injury may occur when an electric arc flash occurs. Heat can cause severe burns that can be fatal. It is therefore imperative to provide adequate training for workers who may be exposed to such risks.
