Which electrical device is typically supported by a 30 amp breaker or fuse?

A clothes dryer is typically supported by a 30 amp breaker or fuse because it often requires a higher amount of current to operate efficiently, especially during its heating cycles. Dryers usually draw significant amperage when they are heating up to dry clothes, which is why the electrical service to these appliances is designed with higher capacity breakers or fuses.

In contrast, appliances like microwave ovens, refrigerators, and ceiling fans typically use less current and are generally protected by lower amperage breakers, such as 15 or 20 amp circuits. This differentiation in amperage ratings is crucial for ensuring that the circuit can handle the appliance's power requirements without tripping or causing damage.