For residential wiring, the maximum number of conductors allowed in a box is guided by which standard?

The maximum number of conductors allowed in a box is specified by NEC 314.16. This section of the National Electrical Code (NEC) provides the guidelines for box fill calculations, which take into account the number of conductors as well as other components such as device yokes and cable entries. It includes a formula and tables that help determine the allowable number of conductors based on the size of the box and the gauge of the conductors.

By utilizing NEC 314.16, electricians ensure that they are not exceeding safe limits, which is crucial for preventing overheating and ensuring that the box can accommodate the connectors and other items without risk of overloading. This careful consideration helps to maintain safety and compliance with electrical codes in residential wiring.