Copyright 2004 arcaware
Definition of an arc;

An electrical flashover is the intense heat and light given out by an electric arc as it flashes over from one exposed live conductor to another or to ground.

An arc's specifications;

The temperature at the centre of an arc can be upto 20,000 degrees centigrade.
The sound blast generated can be up to 140dB, 2 feet from the centre of the arc.
The pressure blast generated can be up to 2000 lbs / ft2.
The intense light given off can be up to 9000 Lux.
Toxic gases like carbon monoxide and copper steam can be omitted.