3 Things to Know About Extension Cord Reset Buttons

A reset button means the cord has thermal overload protection That small rectangular button on the cord head or power strip is a circuit breaker. It trips and cuts power when the cord overheats or draws too much current, and you press it to reset.

Cords without a reset button lack built-in protection These are fine for lights or phone chargers, but do not use them for high-draw devices like space heaters or air conditioners.

Check for a “thermal overload” label if there’s no button Some cheap cords have a non-resettable internal fuse, but this is rare. If your cord lacks any protection, never run a space heater on it.