what is the difference between 12 gauge and 16 gauge extension cord?
For example, a 12 AWG, 120-volt cord contains 12-gauge wires and is intended for use with standard 120-volt outlets. ... To get the same load rating with a 50-foot cord, the cord must have larger, 16 AWG wire. Because of the voltage drop, it's best to use the shortest extension cord possible for the job at hand.