Abstract: An electrical-installation system comprising flat cable and connectors. Power-supply and data-transmission functions are combined in essentially the same plane. The data-transmission wires are not twisted. Contact can be established with the cores inside the connectors by piercing their insulation without stripping it.

Abstract: A threadless electric connector includes a V-shaped plate spring having wing sections joined together to form a vertex at one end and overlapping arms at opposite ends having openings therein spaced from terminal ends of the arms such that an end portion of one of the arms at least partially blocks the opening in the other arm in an initial condition of the spring. One of the wing sections is attached to a support and electric contact element having a flange lying parallel to the arm of the one wing section and containing an opening. In operation, the wing sections are resiliently movable relatively toward one another for aligning all three openings for the reception of an elongated electric conductor which is clamped in place upon release of the pressure applied.

Abstract: This electrical terminal is for attachment to a contact bar of U-shaped cross-section with outwardly projecting flanges of the limbs of the U. Two claws extending towards each other are arranged on a retaining foot of the terminal for engaging the two flanges. Between each claw and the retaining foot, there is a recess for accommodating one of the flanges. A clamping body projects into the recesses by way of its opposite end portions and may be forced away from the retaining foot by way of a locking screw threaded into the retaining foot so that each flange can be clamped rigidly between the claws and one end portion of the locking body. Mutually slidingly engaging guiding surfaces on the locking body and the retaining foot respectively prevent displacement and rotation of the clamping body relative to the retaining foot.

Abstract: An electrical terminal having a housing formed of an insulating material and at least one clamping body having an opening for the reception of at least one conductor. At an open flat side of the insulating housing there is arranged at least one insert element formed of insulating material and forming a pocket receiving a blocking flap which prevents the introduction by mistake of a conductor externally of the clamping body into the insulating housing.