Abstract: An electrical winding contains a metallic winding conductor forming individual windings. The metallic winding conductor contains a metallic conductor and an electrically insulating material surrounding the metallic conductor. An insulation inside the electrical winding can be ensured in a targeted manner by combining an electrically insulating material with a metal oxide layer surrounding the metallic winding conductor, according to the maximum electric strength required inside the electrical winding. In this way, a reduced-size electrical winding can be produced with improved heat properties. An electrical insulation of a metallic electric conductor is further described.