An electrically conductive wire (D) is provided which is constructed on the basis of copper and which includes a core (1) as well as a layer (2) metallically connected to the layer (2), while the layer (2) has a proportion of the wire cross section which is between 20% and 50% of the cross section of the wire. The core (1) on the one nano and the layer (2) surrounding the core (1) consist of different materials on the basis of copper.