3 Things to Know About Coiled Extension Cord Wattage

A fully uncoiled 14-gauge cord handles about 1800 watts (15 amps), but a coiled cord handles only half that — about 900 watts (7.5 amps).

The danger is heat buildup. When coiled, each loop traps heat, which can melt insulation and start a fire. Uncoiled, heat dissipates safely.

For a 50-foot cord running near 15 amps regularly, choose 12-gauge wire instead. It reduces voltage drop and hassle. Coiling is for storage, not operation.