What is Arc flash?
[[File:Crossed wires.JPG|thumb|Arc flash]] '''Arc flash''' is an accidental electrical explosion usually caused by a [[short circuit]]. It usually happens at higher-[[voltage]]s (around 300 volts and above). It can cause the electrical conductors to melt creating an explosion of molten or even vaporized metal. Temperatures can be as high as 20000 degrees [[Celsius]]. Arc flash is one of the reasons it is so important to turn the power off before working on any high-voltage equipment. {{science-stub}} [[Category:Electricity]]