Through terminal block, 284 Series, black Quick and easy connections are guaranteed with this through terminal block (item number 284-905). Conductors should only be connected to this through terminal block if their strip length is between 12 and 13 mm . Whether in industrial or building applications, our rail-mount through terminal blocks are the perfect solution to quickly and securely connect electrical conductors. Depending on the variant, you can use them for either typical through-wiring or potential distribution. Featuring conductor terminals along with CAGE CLAMP®, this connector outperforms the competition. Our highly-rated 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 10 mm². This through rail-mount terminal block is operated with an operating tool.