These electrical boxes come in several varieties (except the lunch box, of course). Which sort of box you choose will depend on where you’re wiring and what kind of wiring you’re performing. After the task is finished, the lunch box will be used. An electrical junction box should have a blank cover plate above it if it simply contains spliced wires and no other equipment, such as switches.
Junction boxes are enclosures made of metal or plastic that house wire connections. The connections within are known as branch circuits, and they often mark the conclusion of a conduit run. Since all that is required to make changes, repairs, or additions to a conduit is to remove the covering, junction boxes make wire access simple. Additionally, junction boxes shield wiring from the environment and the elements, which can occasionally be corrosive or otherwise damaging to wiring material. Finally, junction boxes guard wire against unintended or purposeful manipulation.
Basics of Junction Box Wiring
An electrical junction box essentially stores the wire connections needed to divide electricity from a single source to several outlets. An example would be a junction box that has a single-wire power source that is linked to other wires to power several different lights.
Typically 2 12 to 3 12 inches long, junction boxes can be composed of metal or hard plastic. Whether or not the junction box is intended to hold any weight determines the functional differences between plastic and metal. Light fixtures can be supported by some metal connection boxes, but not by plastic junction boxes. Installation differs as well, with plastic junction boxes often being quicker and simpler to install than metal ones. A typical junction box, however, can be made of either metal or plastic and is intended to simply conceal wire splices.
Splices in Junction Boxes for Wires
Although occasionally splices are overlooked and may pose problems as a result, a building must have all wire splices enclosed within a weatherproof junction box to comply with the electrical code. Any exposed wiring may be hazardous, but exposed wire splices are particularly prone to mishaps since they can be tripped over, emit sparks, or be mistaken for toys by kids or animals. Because they make it simple to find the location of the wire splice, junction boxes are useful for wire splices.
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