This part of IEC 60317 specifies the requirements of paper tape covered rectangular copper winding wires. This covering consists of two or more layers of paper tape@ all in the same direction and is primarily intended for winding coils for oil immersed transformers. The range of nominal conductor dimensions covered by this standard is: ?C width: min. 2@0 mm max. 16@0 mm; ?C thickness: min. 0@80 mm max. 5@60 mm. The paper tapes covered by this standard are restricted to those specified in IEC 60554-1 having thicknesses in the range 25 ?? to 125 ?? inclusive.