US standard measure
of the diameter of electricity
conducting wires. Since it denotes the number of progressively narrower dies through which the wire
is pulled through to reach a particular thinness, it is a backward working (retrogressive) numbering scheme: the thicker the wire, the lower the number and vice versa. AWG assigns numbers only to aluminum, copper
, and other non-iron or non-steel (non-ferrous) wires.