5 Things to Know About Extension Cords for EV Charging

Wire gauge matters more than plug shape An EV pulls high current continuously for hours. A standard 16-gauge cord will overheat, drop voltage, and risk fire.

Match the cord to your charger’s continuous amperage Most Level 1 chargers draw 12 amps continuous. Use a 12-gauge cord minimum, or 10-gauge for runs over 50 feet.

Level 2 charging needs heavier gauge cords For 20-40 amp chargers, use a 6-gauge or 8-gauge cord. Only use dedicated EV extension cords or heavy-duty range cords rated for continuous load.

Check the charger’s spec label Look for the maximum amperage rating on your charger. Buy a cord rated for at least that number.

Connector type is simpler than gauge Just make sure the plug ends match your charger and outlet. Common types include NEMA 5-15 for Level 1 and NEMA 14-50 for Level 2.