Electric switchboard frame system, which includes - a plinth system for the assembly of plinth elements (1, 2) of a selected size from sheet metal structures comprising flange elements (1.2, 1.3, 2.2, 2.3) fitted against a base structure in order to support the frame system from the base structure, - vertical structure elements, wherein vertical profiles (6, 8, 12, 13) forming an attachment base structure for components are each mounted on the plinth elements (1, 2) by their lower ends, - roof structure support elements mounted on the upper ends of the vertical profiles (6, 8, 12, 13) and - a roof structure (11.1, 11.2, 11.3) supported by said vertical profiles (6, 8, 12, 13) and roof structure support elements - cladding elements attached to the rest of the structure and forming a housing structure together with the latter, wherein the plinth system further includes - a first profile of a selected length forming the front and back profiles of the plinth, the first profile having at its bottom a bent segment (1.2) extending inwards, which forms a first flange element against the base structure, and a reinforcing bent segment (1.3) in its upper portion, - a depth-oriented, second profile of a selected length forming at least the end and middle profiles of the plinth, wherein nearly the entire length of the second profile comprises a U-profile (2.3, 2.1, 2.2) open to the side and end flanges (2.4), the second profile including a flange (2.2) fitted against the base structure, an upper flange (2.3) and a midsection (2.1), characterized in that - the upper flange (2.3) and midsection (2.1) of the second profile extend over the entire length of the profile - the ends of the first and second profiles (1, 2) include indentations (2.5, 1.8) adapted to each other in order to fit the profiles (1,2) end to end on the same plane against the base structure, - there are reciprocal series of attachment holes (2.41) in the ends of the first profile, more precisely in its vertical edges, and in each of the end plates (2.4) of the second profile in order to attach these profiles (1, 2) to one another with screw attachments. - a plinth system for the assembly of plinth elements (1, 2) of a selected size from sheet metal structures comprising flange elements (1.2, 1.3, 2.2, 2.3) fitted against a base structure in order to support the frame system from the base structure, - vertical structure elements, wherein vertical profiles (6, 8, 12, 13) forming an attachment base structure for components are each mounted on the plinth elements (1, 2) by their lower ends, - roof structure support elements mounted on the upper ends of the vertical profiles (6, 8, 12, 13) and - a roof structure (11.1, 11.2, 11.3) supported by said vertical profiles (6, 8, 12, 13) and roof structure support elements - cladding elements attached to the rest of the structure and forming a housing structure together with the latter, - a first profile of a selected length forming the front and back profiles of the plinth, the first profile having at its bottom a bent segment (1.2) extending inwards, which forms a first flange element against the base structure, and a reinforcing bent segment (1.3) in its upper portion, - a depth-oriented, second profile of a selected length forming at least the end and middle profiles of the plinth, wherein nearly the entire length of the second profile comprises a U-profile (2.3, 2.1, 2.2) open to the side and end flanges (2.4), the second profile including a flange (2.2) fitted against the base structure, an upper flange (2.3) and a midsection (2.1), characterized in that - the upper flange (2.3) and midsection (2.1) of the second profile extend over the entire length of the profile - the ends of the first and second profiles (1, 2) include indentations (2.5, 1.8) adapted to each other in order to fit the profiles (1,2) end to end on the same plane against the base structure, - there are reciprocal series of attachment holes (2.41) in the ends of the first profile, more precisely in its vertical edges, and in each of the end plates (2.4) of the second profile in order to attach these profiles (1, 2) to one another with screw attachments. - the upper flange (2.3) and midsection (2.1) of the second profile extend over the entire length of the profile - the ends of the first and second profiles (1, 2) include indentations (2.5, 1.8) adapted to each other in order to fit the profiles (1,2) end to end on the same plane against the base structure, - there are reciprocal series of attachment holes (2.41) in the ends of the first profile, more precisely in its vertical edges, and in each of the end plates (2.4) of the second profile in order to attach these profiles (1, 2) to one another with screw attachments.