Through terminal block, 880 Series, operating tool This through terminal block (item number 880-832) is designed for quick and simple connections. Conductors can only be connected to this through terminal block if their strip length is between 8 and 9 mm . 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 product delivers reliable performance. Our CAGE CLAMP® connection offers a secure and maintenance-free way to connect all types of conductors. You do not need to prepare the conductor in any way, such as crimping ferrules. This through terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 4 mm². An operating tool is used to operate this through rail-mount terminal block.