Housing with door for the construction of installation distributors up to 250 A for operation by laypersons in accordance with IEC 61439-3. Open housing walls for combination or as individual housing with locking plates. Made of high-quality polycarbonate, protectively insulated. Fast housing connection using connectors and integrated seals. Large wall bushings for the electrical connection of the housings to one another. Cable entry via flanges. Wall mounting directly on the housing, via external brackets or with mounting rails. Housing with busbars, without device, without terminals. With transparent door and door lock with tool operation.