What is junction box made of?
Usually, the material of junction box can plastic or metalic.
Electrical junction boxes are devices that contain the wiring junctions or intersections that allow the wiring in the home or public building to interface with the main power supply provided by a local utility.
The presence of the box is generally regarded as both practical and more esthetically pleasing than a bunch of exposed electrical wires. While the exact configuration for electrical junctions containers of this type vary slightly, there are a few basic elements that are common to all design