Busbar system, accessories, bar center distance 40mm, busbar holder 3-pole 12x 5, 2x12x 5,15x 5, 2x15x 5 as end and intermediate holder. Attention: Special type busbar system 8US for the installation of protective devices such as fuse switch disconnectors and circuit breakers - safe, space-saving, clear. The use of the Siemens busbar systems 8US offers a wide range of options for the installation of rail-adaptable connection, switching and installation devices. The space-saving modular design and quick-assembly contacting ensure economical electrical equipment in today's installation distribution board construction. The assembly takes place on longitudinal beams, the rail spacing is 60 mm.