Flush-mounted box is used for the installation of electrical equipment (e.g., outlets or branches) inside the wall. Like other banks, the installation of such elements protect the wires and other parts of the electrical system from the effects of adverse external factors. They also allow for easier installation, dismantling or repair of system elements. Flush-mounted box allow you to hide the electrical equipment, beneath the surface of the wall, so that the entire installation is not shown. For this reason they are used in places where aesthetics are important premises (e.g., homes or offices.
Box installation is designed for installation in specific conditions. Should remember that, choosing those elements to the needs of your electrical network. Available models such boxes designed to be installed inside walls, drywall, brick or foam. Selecting a Bank should also take into account possible adverse external conditions such as moisture (e.g. in the basement), extreme temperatures (attic, exterior walls) or UV radiation (in the case of cans that are installed outside of the building). If this model is sustainable on a specific factor, the manufacturer places the relevant information in the technical documentation.
Box outdoor installation, they are easier to install and easier to get to them if you need repair or replacement of components of electrical system. However, less aesthetically pleasing, so often they are used in workshops, garages, factories, warehouses and other places where appearance is not critical. Flush-mounted box allow you to hide elements inside the wall, and also better protection of the electrical connections, but access to them is a bit trickier.
While staying in flush-mounted box, you should pay attention primarily on size. Most popular banks have a diameter of 60 mm and depth 40 mm (small banks) to approximately 60 mm (banks, deep). Banks are deep, they are easier to install and allow further changes of the electrical equipment, one that takes up more space (without replacement box). Not suitable, however, for installation in very hard or thin wall then it is best to opt for a tin plate. Other important features that you should determine prior to purchase, the number of segments (usually one to three), number of pins, material performance (as a rule, do not burn plastic, but also metal cans) and mounting method (screws, plugs, silicone, glue).