A panelboard 1 comprises busbars 2a - 2d of an electrical system and retainers 3 for electrical plug-in devices 4a - 4d being designed for an electrical connection to said busbars. The busbars are fully shrouded along their longitudinal extension by means of an insulating enclosure 5 except for recesses 6 fulfilling at least the standard IEC 60529 IP2X formed in said insulating enclosure, so that the busbars are protected against contact by objects having a diameter greater than or equal to 12.5mm and installation of the panelboard is finger proof. The recesses are designed as lead through devices for electric conductors providing the electrical connection between said plug-in devices and said busbars. An electrical plug-in device designed for use with the panelboard is further disclosed, comprising metal contacts 13a - 13d arranged to reach through the recesses of the insulating enclosure of the panelboard, wherein each of said metal contacts is designed to connect to one of the busbars.
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