My 1900 Watt hair dryer has a seemingly thinner wiring compared to what my computer uses, almost twice as thick and power consumption no greater than 300 Watts. The thickness is however not of the covering over it, keep that in mind. Whether it be 220 Volts or 110V, is there a way to measure the maximum electrical capacity of wire before melt down sequence? Lets say a wire, cross sectional area 1cm^2, copper construction, how would i know its maximum electrical capacity? Also, which is better... 1. Wire with X thickness, 1 piece like that on poles. 2. Wire with X thickness comprised of several thinner wires.