12-gauge cord vs 14-gauge cord for a 14-amp mower: 12-gauge wins for runs over 50 feet

A 14-gauge cord might barely work under 50 feet, but voltage drop is the real enemy — a long, thin cord drops voltage, making the motor draw more current and overheat. Thicker 12-gauge wire has less resistance, so your mower gets full power and runs properly. Always use an outdoor-rated, grounded cord — don’t borrow a light-duty indoor one or you’ll melt things.