What does the NEC® specify as the maximum number of receptacles that can be connected to a 15-amp, 120-volt branch circuit in a school?

The National Electrical Code (NEC) provides guidelines on the number of receptacles that can be connected to a branch circuit to ensure safety and proper electrical load management. For a 15-amp, 120-volt branch circuit, the NEC allows for a maximum connection of 10 receptacles. This standard is based on the consideration that receptacles may not be used at their maximum capacity consistently, and it provides a level of safety against overloading the circuit.

Connecting up to ten receptacles allows flexibility in usage while also accounting for the likelihood that not all outlets will be in use simultaneously. The calculation takes into account the typical load requirements of devices that may be plugged in, ensuring that the circuit can safely handle typical loads without tripping breakers or causing hazards.

While the options suggest a range of possible solutions, the standard of ten receptacles is rooted in practical load management and helps maintain safety within electrical installations in settings such as schools.