The Z7.281.8227.0 is an 8-pole insulated cross connector, type IVB WK 4-8, used for potential commoning with selos WK 4/U feed-through terminal blocks. This jumper bar is fully insulated and touch-safe, allowing for the creation of common potentials across adjacent terminal blocks without the need for additional partition plates. It is designed to handle the same electrical load as the terminal block itself, which is rated for 32 A and 800 V according to EN 60947-7-1, providing a secure and time-saving method for wiring distribution systems.