Through terminal block, 283 Series, CAGE CLAMP® Our through terminal block (item number 283-604) simplifies electrical installations. Conductors should only be connected to this through terminal block if their strip length is between 16 and 17 mm . Whether for industrial or building applications, you can use our through terminal blocks to connect electrical conductors quickly and safely. We offer variants for both classic through-wiring and potential distribution. This product features conductor terminals and utilizes CAGE CLAMP®. Our highly-rated and maintenance-free CAGE CLAMP® connection makes it easy to connect all conductor types without having to prepare the conductor. For example, you don't need to crimp ferrules. This through terminal block is suitable 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.