Housing for the construction of power switchgear combinations up to 630 A or as a single housing. Made of high-quality polycarbonate with protective insulation. Wall bushings with large openings for the electrical connection of the housings to one another. Cable entry on all housing walls via metric knockouts or mounting flanges. Housing for wall mounting also via external brackets or with mounting rails. Housing with load changeover switch (I-0-II), 4-pole, in accordance with IEC 60947-3. With PE terminals for copper conductors. Connection direction can be changed. Handle of the load changeover switch can be locked. Cover locks for tool operation.