What is a requirement for an outlet box when accommodating multiple cables and devices?

The requirement for an outlet box accommodating multiple cables and devices is that it must have a clear maximum volume. This is essential because the volume of the box needs to be sufficient to safely contain all the conductors, devices, and any other fittings installed within it. The National Electrical Code (NEC) specifies that the box size is determined based on the number of conductors and devices, ensuring that there is adequate space to prevent overheating and to allow for proper wire management. If the box is too small, it increases the risk of electrical hazards.

Ensuring that an outlet box has the proper volume is crucial for maintaining safety and functionality in electrical installations. The volume calculations take into account the sizes of wires and the number of devices, providing guidelines that help electricians select the appropriate box for the job.