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The primary reason to be concerned with arc flash is for the safety of the personnel. Short circuits and arc faults are very dangerous and may be potentially fatal to personnel. Exposure to an arc flash frequently results in a variety of serious injuries such as severe burns, damaged eyesight, ruptured eardrums, collapsed lungs, psychological trauma and in some cases - death.

Arc flash is a dangerous type of electrical accident caused when current jumps between voltage levels in an unintended way. The result is a powerful explosion that can lead to serious consequences.

Most of you have probably heard that it's important to have good arc. But why is it so important? Well, simply put more arc will increase the size of the hoop as the ball goes through. Take a look at the image below, it shows the size of the hoop when the ball goes through, with different amounts of arc.