IEC 60317-4 pdf download Specifications for particular types of winding wires – Part 4: Solderable polyurethane enamelled round copper wire, class 1 30 1 Scope This International Standard specifies the requirements of solderable enamelled round copperwinding wire of class 130 with a sole coating based on polyurethane resin，which may bemodified provided it retains the chemical identity of the original resin...