Connection element, arrangement and energy distribution system

A connection element for connecting an insulated electrical conductor, comprising:

• a clamping sleeve body in which a receiving space for the electrical conductor is formed;
• and
• a connection screw which has a screw head and a screw shaft and is introducible into the receiving space along an insertion direction of the connection screw via an opening formed on the clamping sleeve body,
• wherein the receiving space has a first region and a second region which adjoins the first region,
• wherein the first region forms a support region for the conductor and the second region forms a press-in region into which a subregion of the conductor arranged in the first region is pressed by the connection screw in a connected state,
• wherein the second region has two opposite side walls against which strands of the conductor exposed by pressing in the conductor bear in an electrically contacting manner in the connected state,
• wherein the screw shaft has, on an end section thereof opposite the screw head, a tapering region which tapers in the insertion direction of the connection screw, and
• wherein the tapering region has at least two stepped shoulders.