A fuse is not tripped directly by current but rather the current creates heat, and heat trips the fuse. This is known as the “heating effect of electric current.” The amount of heat produced by the flow of current through a fuse wire depends on the following factors: 1-Material of the wire 2-Thickness of wire 3-Length of wire and 4-Amount of current flow. The heat produced due to the high current quickly melts the fuse wire and breaks the circuit. Thus, the flow of current stops and the damage is avoided. Many companies invest in the use of thermography devices to identify heating issues before an electrical failure occurs.