This International Standard establishes minimum requirements and general rules on marking electric equipment with ratings and other characteristics to enable the proper and safe selection and installation of electric equipment related to any supply of electricity. The object of this standard is to: " provide general requirements for marking of the characteristics related to any supply system, such as voltage, current, frequency and power without any restrictions; " provide technical committees with uniform methods for the marking of electrical ratings of products. This publication is primarily intended for application by technical committees when specifying minimum markings of ratings related to any electrical supply of equipment, sub-assemblies and components, but is also applicable for application by product manufacturers for marking their products. NOTE For further markings see ISO/IEC Guide 51.