The following standards contain provisions which, through reference in this text 
constitute provisions of this specification. Unless otherwise stated, the latest editions 
(including amendments) apply. 
ISO 146: Hot dip galvanized 
coatings on fabricated iron and 
steel articles - Specifications 
and test methods. 
IEC 60076: Power transformers. 
IEC 60137: Insulated bushings for 
alternating voltages above 1000V 
IEC 60156 Insulation liquidsDetermination of the breakdown 
voltage at power frequency - Test 
method 
IEC 60296: Specification for unused mineral insulating oil for transformers and 
switchgear. 
IEC 60354: Loading guide for oil - immersed power transformers. 
IEC 60214: Tap-changers - Part 1: Performance requirements and test methods. 
Part 2: Application guide 
IEC 60512: Connectors for electronic equipment 
BS 381C: Specification for colors for identification coding and special purposes