An electric arc flash occurs when electric current passes through the air between ungrounded or grounded conductors. Exposure to this extreme temperature causes burns to the skin as well as ignition of clothing, which increases the burn damage.
What are the causes?
Improper contact in the grid;
Loose connections;
Failure of insulation;
Poor maintenance;
Transient voltage;
Inappropriate short circuit interruption;
Animal contact (such as squirrels, monkeys, etc.).
What are the exposure risks?
Burn caused by energy from the arc flash or due to splashing of molten metal;
Damage from pressure and noise due to the shock wave;
Damage to the respiratory tract.