Surface functional system for surface power supply in the low voltage range, in particular building surface functional system, comprising a) a support system, in particular a support layer, b) a plurality of longitudinal electrical surface conductor paths (5, 6), wherein the plurality of electrical surface conductor paths (5, 6) are present on the front or rear side on the support system or embedded in the support system, wherein the plurality of longitudinal electrical surface conductor paths (5, 6) each having a connection end (51, 61), wherein the connection ends are arranged next to one another, and the surface functional system further comprises c) an, in particular flexible, electrical contact strip, containing at least one first and at least one second electrically conductive conductor band (25, 26), which run adjacent to one another, wherein the first conductor band can be connected to a first pole of a DC voltage source and the second conductor band can be connected to a second pole of the DC voltage source, and f) at least one magnetizable or magnetic holding layer, wherein the first conductor band has contact points for the electrically conductive connection of the connection ends of a first set of electrical surface conductor paths to the first electrically conductive conductor band, and wherein the second conductor band has contact points for the electrically conductive connection of the connection ends of a second set of electrical surface conductor paths to the second electrically conductive conductor band, wherein the electrical surface conductor paths (5, 6) of the first and second set of electrical surface conductor paths are each arranged alternately with respect to one another, wherein the connection ends of the electrical surface conductor paths of the first set of electrical surface conductor paths are reversibly connectable or connected to the contact points of the first electrically conductive conductor band, and wherein the connection ends of the electrical surface conductor paths of the second set of electrical surface conductor paths are reversibly connectable or connected to the contact points of the second electrically conductive conductor band, characterized in that the magnetizable or magnetic holding layer is present on the front side on the support system, in particular the support layer, and in that the magnetizable or magnetic holding layer comprises or represents a plaster coating, a filler layer, a paint layer, a primer layer, and/or a non-woven layer, which is equipped in each case with magnetizable materials. a) a support system, in particular a support layer, b) a plurality of longitudinal electrical surface conductor paths (5, 6), wherein the plurality of electrical surface conductor paths (5, 6) are present on the front or rear side on the support system or embedded in the support system, wherein the plurality of longitudinal electrical surface conductor paths (5, 6) each having a connection end (51, 61), wherein the connection ends are arranged next to one another, and the surface functional system further comprises c) an, in particular flexible, electrical contact strip, containing at least one first and at least one second electrically conductive conductor band (25, 26), which run adjacent to one another, wherein the first conductor band can be connected to a first pole of a DC voltage source and the second conductor band can be connected to a second pole of the DC voltage source, and f) at least one magnetizable or magnetic holding layer, wherein the first conductor band has contact points for the electrically conductive connection of the connection ends of a first set of electrical surface conductor paths to the first electrically conductive conductor band, and wherein the second conductor band has contact points for the electrically conductive connection of the connection ends of a second set of electrical surface conductor paths to the second electrically conductive conductor band, wherein the electrical surface conductor paths (5, 6) of the first and second set of electrical surface conductor paths are each arranged alternately with respect to one another, wherein the first conductor band has contact points for the electrically conductive connection of the connection ends of a first set of electrical surface conductor paths to the first electrically conductive conductor band, and wherein the second conductor band has contact points for the electrically conductive connection of the connection ends of a second set of electrical surface conductor paths to the second electrically conductive conductor band, wherein the electrical surface conductor paths (5, 6) of the first and second set of electrical surface conductor paths are each arranged alternately with respect to one another, wherein the connection ends of the electrical surface conductor paths of the first set of electrical surface conductor paths are reversibly connectable or connected to the contact points of the first electrically conductive conductor band, and wherein the connection ends of the electrical surface conductor paths of the second set of electrical surface conductor paths are reversibly connectable or connected to the contact points of the second electrically conductive conductor band, characterized in that the magnetizable or magnetic holding layer is present on the front side on the support system, in particular the support layer, and in that the magnetizable or magnetic holding layer comprises or represents a plaster coating, a filler layer, a paint layer, a primer layer, and/or a non-woven layer, which is equipped in each case with magnetizable materials.