Enclosures

GANG BOXES : Electrical gang boxes are used to encase electrical components such as switches,sockets,dimmer etc.
They provide the necessary support and safety for direct contact with external objects. The idea is that you can gang up electrical components in the box.

JUNCTION BOXES : Junction boxes are the housing boxes that accommodate wiring joints across various junctions of electrical lines.
They protect them from dust,moisture and external influences.

SURFACE BOXES:
Modular Surface Boxes are used to create foundational support for modular switches and plates.
They secure and enclose electrical wiring from tampering. They safeguard users from electrocution by acting as a barrier between the wiring and them.
Surface Boxes are mounted on the surface over the wall as opposed to Conceal Boxes which are placed inside a recess in the wall.

CONCEALED BOXES : Concealed Boxes are simple enclosures used to create mounting support and enclose wires in a concealed wiring system. They are concealed inside a wall.
Concealed Boxes are necessary for mounting switches right on the wall.