Electrical flat conductor (40, 60, 80, 100) for motor vehicles, - with a flat conductor core (42, 62, 82, 102) of electrically conductive flat conductor material and - with an insulation (44, 64, 84, 104) of an insulating material encasing the flat conductor core (42, 62, 82, 102), - wherein the height (Hk) of the flat conductor core (42, 62, 82, 102) is less than the width (Bk) of the flat conductor core (42, 62, 82, 102), - wherein the flat conductor core (42, 62, 82, 102) has at least one narrow side (46a-b, 68a-b, 86a-b, 106a-b) which limits the width (Bk) of the flat conductor core (42, 62, 82, 102) to one side, - wherein the flat conductor core (42, 62, 82, 102) has at least one broad side (48a-b, 88a-b, 108a-b) which limits the height (Hk) of the flat conductor core (42, 62, 82, 102) to one side, and - wherein the flat conductor (40, 60, 80, 100) has at least one bend around a narrow side (46a-b, 68a-b, 86a-b, 106a-b) of the flat conductor core (42, 62, 82, 102), characterised - in that the insulation (44, 64, 84, 104) has, at least in sections over the length of the flat conductor (40, 60, 80, 100), a greater wall thickness on at least one side (46a-b, 48a-b, 68a-b, 86a-b, 88a-b, 106a-b, 108a-b) of the flat conductor core (42, 62, 82, 102) than on at least one other side (46a-b, 48a-b, 68a-b, 86a-b, 88a-b, 106a-b, 108a-b) of the flat conductor core (42, 62, 82, 102), wherein the insulation (44, 64, 84, 104) has a greater wall thickness on the at least one narrow side (46a-b, 68a-b, 86a-b, 106a-b) of the flat conductor core (42, 62, 82, 102) than on the at least one broad side (48a-b, 88a-b, 108a-b) of the flat conductor core (42, 62, 82, 102). - with a flat conductor core (42, 62, 82, 102) of electrically conductive flat conductor material and - with an insulation (44, 64, 84, 104) of an insulating material encasing the flat conductor core (42, 62, 82, 102), - wherein the height (Hk) of the flat conductor core (42, 62, 82, 102) is less than the width (Bk) of the flat conductor core (42, 62, 82, 102), - wherein the flat conductor core (42, 62, 82, 102) has at least one narrow side (46a-b, 68a-b, 86a-b, 106a-b) which limits the width (Bk) of the flat conductor core (42, 62, 82, 102) to one side, - wherein the flat conductor core (42, 62, 82, 102) has at least one broad side (48a-b, 88a-b, 108a-b) which limits the height (Hk) of the flat conductor core (42, 62, 82, 102) to one side, and - wherein the flat conductor (40, 60, 80, 100) has at least one bend around a narrow side (46a-b, 68a-b, 86a-b, 106a-b) of the flat conductor core (42, 62, 82, 102), characterised - in that the insulation (44, 64, 84, 104) has, at least in sections over the length of the flat conductor (40, 60, 80, 100), a greater wall thickness on at least one side (46a-b, 48a-b, 68a-b, 86a-b, 88a-b, 106a-b, 108a-b) of the flat conductor core (42, 62, 82, 102) than on at least one other side (46a-b, 48a-b, 68a-b, 86a-b, 88a-b, 106a-b, 108a-b) of the flat conductor core (42, 62, 82, 102), wherein the insulation (44, 64, 84, 104) has a greater wall thickness on the at least one narrow side (46a-b, 68a-b, 86a-b, 106a-b) of the flat conductor core (42, 62, 82, 102) than on the at least one broad side (48a-b, 88a-b, 108a-b) of the flat conductor core (42, 62, 82, 102).