What is the maximum amperage rating for a standard residential circuit breaker?

The maximum amperage rating for a standard residential circuit breaker is generally established at 15 amps and 20 amps for lighting and general-purpose circuits. In many residential installations, circuit breakers of higher ratings such as 30 amps are used, particularly for appliances like dryers or air conditioning units. However, when considering standard residential circuit breakers specifically for branch circuits in homes, the predominant ratings are much lower than 40 amps.

While higher rated breakers exist for specific applications within residential settings, they typically serve dedicated applications rather than being considered "standard." Thus, the most appropriate answer revolves around understanding that standard residential circuits are most commonly rated at a maximum of 15 amps or 20 amps.