What gauge of wire is used in the example of the junction box containing multiple conductors?

In electrical installations, the gauge of wire used is critical for ensuring safety and compliance with electrical codes, particularly regarding the number and size of conductors within a junction box. The correct answer indicates that 12 AWG wire is utilized in the example with multiple conductors.

12 AWG (American Wire Gauge) wire is commonly used for branch circuits in residential wiring. It can safely handle a maximum current of 20 amps, making it suitable for a variety of applications, including circuits for outlets and lighting. This gauge strikes a balance between flexibility for installation and the capacity required for moderate current loads.

Additionally, when dealing with junction boxes that contain multiple conductors, it is essential to adhere to specific fill calculations as dictated by the National Electrical Code (NEC). Using 12 AWG wire helps ensure that even when multiple wires are bundled together, they can meet the required ampacity without exceeding heat limits, thus maintaining safety and efficiency in the circuit.

Other gauges, such as 10 AWG or 14 AWG, have their respective applications but would not be the standard choice for typical residential junction boxes with multiple conductors. 10 AWG is usually reserved for higher current applications, while 14 AWG is suitable for circuits not exceeding