How to Calculate Amp Circuit Breaker for Given Watts
1. What will be the amperage for the circuit breaker if the power supply is 60 Watts? 2. What will be the amperage for the circuit breaker if the power supply is 120 Watts? 3. What will be the amperage for the circuit breaker if the power supply is 240 Watts? 4. What will be the amperage for the circuit breaker if the power supply is 480 Watts?
A 4 amp circuit breaker would be needed. The amp rating for the circuit breaker can be calculated by dividing the power in watts by the voltage in volts. To calculate the number of amp circuit breaker needed for a given wattage, you can use the formula P = VI, where P is the power in watts, V is the voltage in volts, and I is the current in amps. 1. If the power supply is 60 watts and the voltage is 120VAC, we can use the formula: P = VI 60 = 120 * I I = 60/120 I = 0.5 amps A 0.5 amp circuit breaker would be appropriate. 2. If the power supply is 120 watts and the voltage is 120VAC, we can again use the formula: P = VI 120 = 120 * I I = 120/120 I = 1 amp A 1 amp circuit breaker would be suitable. 3. If the power supply is 240 watts and the voltage is 120VAC: P = VI 240 = 120 * I I = 240/120 I = 2 amps A 2 amp circuit breaker would be required. 4. If the power supply is 480 watts and the voltage is 120VAC: P = VI 480 = 120 * I I = 480/120 I = 4 amps