Ground terminal block, 279 Series, operating tool Connect conductors quickly and securely with this ground terminal block (item number 279-837). Conductors should only be connected to this ground terminal block if their strip length is between 8 and 9 mm . WAGO's ground terminal blocks allow you to connect electrical conductors directly to the mounting rail thanks to an integrated contact foot. This connection ensures both electrical and mechanical stability between the conductors and the mounting adapter. This product features conductor terminals and utilizes CAGE CLAMP®. Our celebrated universal connection known as CAGE CLAMP® is industry-leading when it comes to connection technology and electrical interconnections. The item's dimensions are (4 x 73 x 31.5) mm (width x height x depth). This ground terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 1.5 mm². An operating tool is used to operate this through rail-mount terminal block.