They are used for the distribution of electricity in enterprises, in public or residential buildings, etc. They can be standalone, for wall mounting or for wall embedding. Power-distribution switchboards are mainly made of solid metal frame and powder coated sheet metal or rigid metal box, mainly used in industrial sites or as main switchboards (MSB) in buildings. In most cases, the apparatus in them is placed on a metal plate. Modular distribution boards are mostly used as the last unit in the distribution of energy to final household consumers (lighting, plugs, etc.). They can be made of both powder-painted sheet metal and plastic. Of course, in some cases they can also take on the role of main switchboards.