What is the maximum number of outlets allowed on a 20-amp branch circuit for general use in dwelling units?

The maximum number of outlets allowed on a 20-amp branch circuit for general use in dwelling units is determined by the National Electrical Code (NEC). According to the NEC, for general purpose branch circuits, the calculation for the number of outlets is based on a consideration of load calculations, specifically the anticipated demand from those outlets.

When calculating the maximum number of general-use receptacles, the NEC guidelines allow for a maximum of 10 outlets on a 20-amp circuit. This approach takes into account the typical load and ensures that electrical circuits are not overloaded, thus providing for safety and efficiency in residential wiring. Each outlet is typically evaluated under a standard load of 1.5 amps, allowing for a total of 10 outlets to be used safely on a 20-amp circuit.

The other options exceed this recommended amount, which would not conform to the code's safety measures. Therefore, referencing the NEC's provisions, the correct answer reflects a standard which helps avoid possible overload conditions that could lead to wiring overheating or circuit failure.