3600 watts

How Many Watts Is 20 Amps At 240 Volts? 20-amp 240-volt circuit: 20 amps x 240 volts = 4,800 watts. How many watts can I run on a 20 amp circuit? A 20-amp breaker can support up to 2,400 watts on a single circuit. The safe maximum for a 20-amp circuit is 1,920 watts, but