A small metal junction box may form a part of an electrical conduit or thermoplastic-sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it's used mostly in ceilings, under floors or concealed behind an access panel—particularly in domestic or commercial buildings. An appropriate type could also be buried within the plaster of a wall or cast into concrete—with only the duvet visible.
It sometimes includes built-in terminals for the joining of wires.
A similar, usually wall mounted, container used mainly to accommodate switches, sockets and therefore the associated connecting wiring is named a pattress. Junction boxes form an integral part of a circuit protection system where circuit integrity has been to be provided, as for emergency lighting or emergency power lines, or the wiring between a nuclear reactor and a control room. In such an installation, the fireproofing round the incoming or outgoing cables must even be extended to hide the junction box to stop short circuits inside the box during an accidental fire
This sort of electrical casing typically comes in two sizes. Junction boxes that measure 2 inches x 3 inches, with a depth of two .5 inches, generally contain three wires. Boxes that measure 2 inches x 3 inches and have a depth of three .5 inches are made for five or more wires.
These boxes are extensively used for connecting wires and also allow quick access when repairing is required. Made from high grade staple , our under floor junction boxes are corrosion resistant and have high load bearing capacity. Aluminium Floor junction boxes are patented products for wire management on construction and interior sites, addressing problems with aesthetics, finishing, safety, logistics, environment and sustainability through innovative use of fabric and assembly. They can be fabricated on site or modified to any size and have high load bearing capacity. Best advantage is that the lid can take any floor finish, thus giving a seamless floor.These electrical floor outlet or floor access box are ideal for locations like in office spaces, hotels, showrooms, hospitals, institutes, educational institutes/universities, airports, industries, et al. , like commercial establishments
Professionals usually recommend installing a junction box by bringing a new wire from the main electrical panel to the box instead of tapping off an existing electrical box. This is done to avoid circuit overload, which is important in order to protect against the threat of a potential electrical fire.
You can buy junction boxes at the any hardware or home improvement store. Electricians typically secure a junction box to a robust structural location, like a stud or joist. This is especially important if the box are going to be wont to support a light-weight fixture
Always close up the facility before performing on a junction box. You don't want to be the unfortunate one that comes across a highly dangerous hot wire.
Also, don't just guess which breaker switch controls the space you're working in. Instead, hit the main breaker in order that there'll be no doubt in the least about the very fact that the facility is turned off..