Ground terminal block, 880 Series, operating tool This ground terminal block (item number 880-687) is designed to connect conductors quickly and easily. Conductors should only be connected to this ground terminal block if their strip length is between 8 and 9 mm . Our ground terminal blocks directly connect the mounting rail and the electrical conductors thanks to an integrated mounting 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 trusted universal connection known as CAGE CLAMP® is industry-leading when it comes to connection technology and electrical interconnections. Depending on the type of conductor, this ground terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 4 mm². An operating tool is used to operate this through rail-mount terminal block.