The answer to 'why is my circuit breaker tripping breaker' is that a circuit breaker trips when there is an electrical overload or short circuit in the circuit. This is a safety feature to prevent damage and fires. Common causes include too many appliances or devices plugged into the circuit, a faulty or malfunctioning appliance, damaged wiring, or a short in the electrical system.
When a circuit breaker trips, you'll notice the breaker switch has flipped to the 'off' position. To reset it, simply switch the breaker back to the 'on' position. However, it's important to first identify and address the underlying cause to prevent the breaker from tripping again. If the breaker continues to trip, it's best to call a licensed electrician to inspect the electrical system and make any necessary repairs.