IEC 60317-21 Ed. 3.1 b:2019

IEC 60317-21 Ed. 3.1 b:2019 Specifications for particular types of winding wires - Part 21: Solderable polyurethane enamelled round copper wire overcoated with polyamide, class 155 CONSOLIDATED EDITION
standard by International Electrotechnical Commission, 06/12/2019

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IEC 60317-21:2013+A1:2019 specifies the requirements of solderable enamelled round copper winding wire of class 155 with a dual coating. The underlying coating is based on polyurethane resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The superimposed coating is based on polyamide resin.