ISO 9247:1990

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ISO 9247:1990 is an international standard that specifies the fundamental principles for identifying and marking electrical wires and cables used in earth-moving machinery. It outlines a coding system using numbers, colors, letter symbols, or combinations of these for identification. The standard was published in September 1990 and has been reviewed and confirmed in 2021, according to the ISO website. It applies to earth-moving machinery as defined in ISO 6165.