Specifies the requirements of enamelled round copper winding wire of class 180 with a sole coating based on polyesterimide resin. Covers the following range of nominal conductor diameters: 0,018 mm up to and including 3,150 mm (Grade 1); 0,020 mm up to and including 5,000 mm (Grade 2); 0,250 mm up to and including 1,600 mm (Grade 3). Coverage includes dimensions, temperature index, loss of mass, heat shock, electrical resistance, elongation, and packaging.