12th November 2019


How many watts can you put on a 30 amp breaker?

A 30-amp outlet supplies 3,600 watts (30 amps multiplied by 120 volts). Therefore, the breaker on that outlet could meet code and still trip anywhere between a total load of 2,880 watts (80 percent of 3,600 watts) and 4,320 watts (120 percent of 3,600 watts).

In this regard, how many watts is a 20 amp circuit?

20 AMPS x 120 volts = 2400 watts. As you know by now, you can only load up to 80% of the stated rating. What can I plug into a 20 AMP circuit? A 20 amp circuit at 120 volt (80%) will hold 1920 watts.
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