A junction box is an electrical enclosure that houses one or more wiring connections. The box protects the connections, which usually contain vulnerable points such as wire splices, from environmental conditions and accidental contact.
Junction boxes protect the electrical connections from the weather, as well as protecting people from accidental electric shocks.
A small metal or plastic junction box may form part of an electrical conduit or thermoplastic sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it is used mostly in ceilings, under floors or concealed behind an access panel—particularly in domestic or commercial buildings. An appropriate type may be buried in the plaster of a wall (although full concealment is no longer allowed by modern codes and standards) or cast into concrete with only the cover visible.
Electrical junction box in the process for installation. Electrical Conduit terminate at the sides and cables pass through or are joined inside the box.
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Explosion Proof Enclosures