IEC 60317-1 pdf download Specifications for particular types of winding wires – Part 1: Polyvinyl acetal enamelled round copper wire, class 105 1 Scope This Part of IEC 6031 7 specifies the general requirements of enamelled round copper winding wires of class 1 05 with a sole coating based on polyvinyl acetal resin, which may be modified providing it retains...