50 feet is the max for a 14-gauge cord on a 15-amp circuit.

Go with 12-gauge if you need longer. Here’s why: voltage drop adds up fast with cheap extension cords.

On a 120V circuit pulling the full 15 amps, you lose about 3% of your voltage at 50 feet with 14-gauge copper. That’s the line where tools start running weak and motors can overheat. Beyond that? You’re wasting power and risking damage to whatever you’ve plugged in.

If you need 100 feet, step up to 12-gauge cord — that keeps the drop under 3%. And never daisy-chain multiple cords to cheat the length; that’s just asking for trouble.

Grab a 12-gauge 50-footer and call it done. Your tools will thank you.