Electrical connection box for an automotive vehicle

An electrical connection box for an automotive vehicle, comprising:

• internal circuits which are accommodated in a casing, and which are divided at least into large current circuits for accommodating currents above a selected level, medium current circuits for accommodating a range of current levels less than the large current circuits and small current circuits for accommodating current levels less than the medium current circuits,
• wherein the large current circuits are substantially constructed by at least one busbar, the medium current circuits are substantially constructed by wires and cramping terminals connectable with the wires, and the small current circuits are constructed by at least one flexible printed circuit, the wires of the medium current circuits being arranged along wire arrangement guides provided at an insulation plate disposed in the casing, and wherein the at least one busbar is placed on upper end portions of said at least one wire arrangement guides, so as to arrange the wires and the busbar on spaced planes, and wherein the flexible printed circuit is folded at one end surface of the insulation Plate, so as to extend along first and second surfaces of one side portion of the insulation plate.