Boards themselves can be classified by the material body (metal, plastic), and type of installation (external, internal). Metallic Power Distribution Unit are more durable, besides, they do not burn, and provide better protection against external influences. Plastic boards are generally cheaper and easier to 'fit' into the interior, but they are limited in size. Because of large Power Distribution Unit number of items usually consists of metal casing, and small, say, the floor – the plastic. Type of installation (mounted or recessed housing) is selected, based on local conditions. Foundation Academy is often quoted as being for or against this. Wall cabinets easier to install, and Embedded save space, while, however, require a deepening of the wall, which is not always possible. Type of installation can also define and selected circuit wiring: When the external wiring usually used hinged boards, when hidden – recessed. Leading suppliers of panels should recognize abb and Schneider Electric, offering a wide range of sizes and designs Power Distribution Unit.
Deserves attention and panelboard products Eldon, as well as Metal panels produced domestically. When selecting the manufacturer recommend to pay attention to the fullness of accessories designed for the installation of meters, protection and management: racks, different profiles mounting plates, overhead panels. Devices that are installed in Power Distribution Unit can be divided into corps and unit. The first is a product shape and dimensions are not standardized. They are installed, usually separately, the mounting plate. This group includes circuit breakers for large (more than 125 A) currents, the bulk of electricity meters, circuit breakers and other equipment.