What is the maximum number of outlets allowed on a 15-amp circuit in residential wiring according to NEC?

In residential wiring according to the National Electrical Code (NEC), the general guideline for determining the maximum number of outlets on a 15-amp circuit is based on a calculation that considers the load and safety margins. The NEC suggests calculating the maximum number of outlets by allowing 1.5 amps per outlet. To determine the total number of outlets, you can divide the circuit's capacity (15 amps) by the load per outlet (1.5 amps), which results in a maximum of 10 outlets for a 15-amp circuit.

This calculation provides a good balance between safety and functionality, ensuring that the circuit is not overloaded while allowing enough outlets for typical residential use. It's important to remember that this is a guideline and that real-world installations may require adjustments depending on the specific types of outlets and devices connected.

By adhering to this guideline, electricians can ensure compliance with safety standards, minimizing the risk of overheating or tripping circuit breakers due to an overly loaded circuit.