Specifies the requirements of solderable enamelled round copper winding wire of class 155 with a sole coating based on polyurethane resin, which may be modified as long as it retains the chemical identity of the original resin and meet all specified wire requirements. Covers the following range of nominal conductor diameters: 0,018 mm up to and including 0,800 mm (Grade 1) and 0,020mm up to and including 0,800 mm (Grade 2). Coverage includes dimensions, elongation, heat shock, electrical resistance, and packaging. BS AMD 9059 RENUMBERS THIS STANDARD