12-gauge vs 14-gauge extension cord: 12-gauge wins for 100-foot runs with a 15-amp saw

14-gauge technically handles 15 amps, but over 100 feet the voltage drop kills saw power and can overheat the cord. 12-gauge keeps voltage near 120V, the saw runs full power, and the cord stays cool. Don’t cheap out—a 12/3 cord costs more but is cheaper than a new saw.