Through terminal block, 284 Series, operating tool Connecting conductors is quick and easy with this through terminal block (item number 284-993). Conductors should only be connected to this through terminal block if their strip length is between 12 and 13 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 connector delivers reliable performance. Our CAGE CLAMP® connection provides a convenient 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. Depending on the conductor type, this through terminal block is designed for conductor cross sections ranging from 0.2 mm² to 10 mm². An operating tool is used to operate this through rail-mount terminal block.