arc flash
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[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/30/24_Million_Watt_high_speed_flash_through_welding_lens.jpg/220px-24_Million_Watt_high_speed_flash_through_welding_lens.jpg)
Noun
[edit]arc flash (countable and uncountable, plural arc flashes)
- (electrical engineering) The extremely intense light and heat produced by a high-energy electric arc.