Circuit breakers trip for many reasons, including overloading, faulty wiring, and damage to the wiring or equipment. If your breaker trips when you turn it off and on, you can try unplugging or turning off some electronics to prevent it from tripping again. If the breaker still trips, you can try resetting it by flipping it to the OFF position, then to the ON position, and repeating this step two times. If the breaker continues to trip, you should contact a licensed electrician