Electrical panelboard with improved separating walls

A panelboard (1a, 1 b) with a housing (2) is disclosed, wherein the housing (2) comprises a first compartment (A) for a plurality of plug-in devices (3), a plurality of retainers (11 ) for said plurality of electrical plug-in devices (3) and at least two plug-in devices (3), which are arranged in said first compartment (A), are mounted to said retainers (11 ) and are electrically connected to busbars (10a..10d) of the panelboard (1 a, 1 b). The busbars (10a..10d) are assigned to phases of an electrical system (L1,.L3, N) and shrouded along their longitudinal extension by means of an insulating enclosure (7). Moreover, the panelboard (1 a, 1 b) comprises a detachable separating wall (14, 14a..14c), which is arranged in said first compartment (A) between the at least two plug-in devices (3) creating sub-compartments (A1...A4) and which is fastened to the insulating enclosure (7) between two plug-in devices (3).