3M™ Low Voltage In-line Connector CL1 is suitable for cable cross sections 1,5-16 mm2. These screw connectors are used for connecting cables up to 1 kV. The connector works with round Copper and Aluminium conductors.
"Use 3M™ Low Voltage In-line Connector CL1 with cable cross sections 1,5-16 mm2, round Copper and Aluminium conductors, up to 1 kV. Screw connectors have a very high tensile load. The transverse grooves in the shaft and the spherical shape of the contact screws allow very high tensile forces."