IEC 60317-12:2010 specifies the requirements of enamelled round copper winding wire of class 120 with a sole coating based on polyvinyl acetal resin, which may be modified providing it retains the chemical identity of the original resin and meets all specified wire requirements. The main changes with respect to the previous edition is a new pin hole test requirements in Clause 23 have been added.

This publication is to be read in conjunction with IEC 60317-0-1:2008.