What is the minimum ampacity for a residential circuit in the NEC?

In residential wiring, the National Electrical Code (NEC) specifies that the minimum ampacity for general-purpose circuits is 15 amps. This minimum is designed to support typical residential loads, such as lighting and receptacles, ensuring that homes have adequate power for basic electrical needs without overloading the system.

Using a 15-amp circuit helps to minimize risks associated with overheating and promotes the safety of the electrical installation. In many cases, common household appliances and light fixtures are designed to operate efficiently on 15-amp circuits, aligning with this NEC standard.

While larger circuits are certainly used for specific applications, such as kitchen appliances or dedicated equipment, the general guideline for residential circuits starts at 15 amps, making it the correct benchmark.