Abstract: A connector plug for permanent connection to a plurality of conductors each having a bundle of wire strands. The plug includes a housing formed by complementary insulating shells which abut each other at their edges. Contact members secured in the shells each include a connection portion for connection within the housing to a respective one of the conductors at an end portion from which insulation has been removed over a predefined length to expose the wire strands. An insulating partition is disposed between each connection portion and the abutting edges of the shells to prevent any wire strands remaining loose after connection from projecting from the housing.

Abstract: An electric cord set having a plurality of stranded conductors and a connection plug with an identifying connection element, such as a grounding pin, the identified connection element being connected to a conductor identified by having a higher magnetic permeability than the other conductors. Preferably, the ground wire is made of wire strands similar to the other conductors, but contains 1 to 3 auxiliary steel wire strands. In a method and device for manufacturing such a cord set, the cord is arranged next to a magnetic sensing element and rotated about the cord axis automatically while the permeability is sensed. The cord is then fixed in a position of highest or lowest detected permeability, so as to identify the location of the unique conductor, and the plug is then connected.

Abstract: An electrical cord winder comprises a mechanical section and an electrical section. The mechanical section includes a rotatable cord drum rotatably journalled on a hollow journal secured at one end to a frame, the drum being axially retained between the frame and a plate secured to the other, free end of the hollow journal. A spring is tensioned between the drum and the frame for automatically winding the cord. The electrical section includes rotary electrical couplings which can be fitted into the hollow journal from the free end thereof.