The WAGO part 870-837 is a 4-conductor ground terminal block designed to securely and efficiently connect electrical grounding wires. It is suitable for use with wires measuring 2.5 mm² and features lateral marker slots for easy identification. The terminal block is compatible with DIN-rails measuring 35 x 15 and 35 x 7.5, making it a versatile choice. It utilizes WAGO's patented CAGE CLAMP® technology, ensuring reliable connections. The terminal block is color-coded in green and yellow for clear identification of ground wires.