BusbarN system Busbar centre distance 60mm Equipment support, width: 45mm Bar thickness: 5.10mm+TT profile without electrical contact with 1 35mm support rail, for side mounting on 8US1211-1NS10 adapters long 200mm Busbar system 8US for mounting 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 busbar-adaptable connection, switching and installation devices. The space-saving modular design and quick-assembly contacting ensures economical electrotechnical equipment in today's installation distribution board construction. The installation is carried out on longitudinal rails, the rail spacing is 60 mm. The Siemens busbar systems 8US are particularly characterised by 1. mechanical fastening and electrical contacting in one operation. 2. worldwide approval and thus worldwide use.