3 Things to Know About Extension Cord Gauge and Length

50 feet is the maximum safe length for a 14-gauge cord on a 15-amp circuit. At 50 feet pulling 15 amps, you lose about 3% of voltage, which is the limit before tools run weak and motors overheat.

Use a 12-gauge cord if you need more than 50 feet. A 12-gauge cord keeps voltage drop under 3% at 100 feet, so your tools get the power they need.

Never daisy-chain extension cords to reach longer distances. Connecting multiple cords increases resistance and fire risk; just buy the right single cord for the length you need.