What is the typical rating of circuit breakers used in residential installations?

The typical rating of circuit breakers used in residential installations is 20 amps. This rating is standard for most general-purpose circuits, particularly for outlets in living spaces and areas like kitchens, where additional power may be necessary for appliances.

Understanding this rating is important as it ensures that the circuit can handle the average load from connected devices while providing the necessary protection against overloads and short circuits. In residential wiring, 15-amp breakers are commonly used for lighting circuits, which is a special consideration, as they provide adequate protection without exceeding the capacity of typical lighting fixtures. Ratings above 20 amps, such as 30 and 50 amps, are typically reserved for specific applications like larger appliances or dedicated circuits, making them less common for general household use. Thus, a 20-amp circuit breaker strikes a balance between ensuring safety and accommodating typical electrical needs in a residential setting.