Under Article 314, what is a "pull box"?

A pull box, as defined under Article 314 of the National Electrical Code (NEC), is specifically designed to assist in the pulling of conductors and to provide access for maintenance purposes. This functionality is crucial in electrical installations where long runs of conductors are involved, as it allows for easier navigation of bends and turns in the conduit system without straining the wires.

The presence of a pull box enables electricians to make connections or modifications more efficiently and safely, as it reduces the pulling tension on the conductors. It also serves as a convenient access point to inspect wiring integrity and perform repairs or maintenance without requiring extensive disassembly of the conduit system.

In contrast, other options describe different types of boxes or functionalities. For example, a box used solely for circuit breakers serves a specific purpose related to disconnecting power and does not facilitate conductor pulling. A box meant for protecting wires from environmental elements refers to enclosures that safeguard conductors rather than aid in their installation. Lastly, a temporary box for unused conductors does not reflect the appropriate application and definition of a pull box, which is primarily about maintaining accessibility and functionality during installation and future maintenance.