However, if you are using a 240V device on a 120V circuit, you need a circuit breaker with a 240V rating, as the device may draw more current than the circuit can handle.

Why Do Breakers Trip? The circuit and circuit breaker that keeps tripping have a capacity of 15 amps, or 1,800 watts (15 amps x 120 volts = 1,800 watts). The lights drew 360 watts, or a measly 3 ...

Step 2: Determine the Total Amps of Each Circuit For each breaker, multiply the amperage rating by the voltage level supplied to the circuit (typically either 120V or 240V). This calculation will give ...

Appropriate for a two-pole 20-amp breaker or a single-pole 30-amp breaker. 8-gauge or 6-gauge wire Used for 40-, 50- and 60-amp two-pole breakers; large appliances. Also used to serve subpanels.

To provide the necessary protection, new aircraft circuit breakers have been developed with ratings of 300 and 600 amperes at 28 volts and 250 amperes at 120 volts. The interrupting ratings, over a ...