Through terminal block, 283 Series, light gray Quick and easy connections are guaranteed with this through terminal block (item number 283-691). Strip lengths must be between 16 and 17 mm when connecting conductors to this through terminal block. Whether for use in industry or building installations, our rail-mount through terminal blocks make it easy to quickly and securely connect electrical conductors. They’re perfect for either classic through-wiring or distributing potential, depending on the variant. Featuring conductor terminals along with CAGE CLAMP®, this connector is highly versatile. Our reliable and maintenance-free CAGE CLAMP® connection makes it easy to connect all types of conductors without having to prepare the conductor. For example, you don't need to crimp ferrules. Depending on the conductor type, this through terminal block is designed for conductor cross sections ranging from 0.2 mm² to 16 mm². An operating tool is used to operate this through rail-mount terminal block.