Housing with door for the construction of installation distributors up to 250 A for operation by laymen in accordance with IEC 61439-3. Open housing walls for combination or as individual housing with cover plates. Made of high-quality polycarbonate, protectively insulated. Fast housing connection using plug connectors and integrated seals. Large wall bushings for the electrical connection of the housings to each other. Cable entry via flanges. Wall mounting directly on the housing, via external brackets or with mounting rails. Housing with fuse switch disconnector NH 1, 3-pole, in accordance with IEC 60947-3 on mounting plate. With supply terminals, PE and N terminals. With bridge for dividing the supply line. Connection compartment can be changed. With transparent door and door lock with tool operation.