Busbar system, accessories rail center distance 40, 60 mm connection terminal rail thickness: 10 mm + TT profile 16-120 mm². The 8US busbar system is designed for the installation of protective devices such as fuse load disconnectors and circuit breakers - safe, space-saving, and clear. The use of Siemens 8US busbar systems offers a variety of options for the installation of rail-adaptable connection, switching, and installation devices. The space-saving modular design and quick-mount contact system ensure cost-effective electrical equipment in today's installation distribution construction. Installation is done on longitudinal beams, with a rail spacing of 60 mm. The Siemens 8US busbar systems are characterized primarily by: 1. Mechanical fastening and electrical contact in one operation. 2. Worldwide approval, allowing for global applications in machine and plant construction. 3. Easy replacement of individual devices or entire combinations. 4. Time savings in assembly and cost reduction through pre-assembled consumer branches. 5. High operational safety due to finger-safe covers on adapters and device carriers. 6. A wide range of usable busbars for easy adaptation to current ratings up to 1,600 A. Siemens offers a comprehensive portfolio of protective, switching, measuring, and monitoring devices, installation distributors, as well as switches and sockets for a safe and efficient electrical infrastructure in buildings and industry.