Hair Dryer Ratings

which won't open the circut?

1500-W hair dryer is run on a 120-V rms circuit. If the circuit breaker is chosen from breakers with the ratings below, which is the lowest-rated current breaker of the following that won’t open the circuit? Note: P = I V 10 A 15 A 20 A 30 A 60 A

Public Comments

1. As you have pointed out the power is a product of voltage used time the current consumed by the device. We have P= V I then I= P/V= 1500 / 120 = 12.5 A I would take 15A breaker