Through terminal block, 284 Series, gray This through terminal block (item number 284-601) streamlines wire connections, making them both quick and easy. Conductors can 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 allow you to quickly and securely connect electrical conductors. They’re perfect for either classic through-wiring or distributing potential, depending on the variant. This product features conductor terminals and utilizes CAGE CLAMP®. Our proven universal connection known as CAGE CLAMP® leads the way when it comes to connection technology and electrical interconnections. 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.