What is the primary use of a junction box?

The primary use of a junction box is for making wiring connections. Junction boxes are designed to safely enclose and protect electrical connections between wires. They allow for the safe joining of multiple conductors, facilitating branching of circuits while providing a safe environment to prevent electrical shorts and damage.

These boxes also serve an important safety function by containing any sparks or heat that may be produced during electrical operations, thus minimizing the risk of fire hazards. While junction boxes can sometimes house switches and outlets, protect against water damage, or secure fixtures, those are not their fundamental purpose. The core function revolves around connecting different electrical wires and ensuring it is done safely and effectively.