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IEC 60512-13-5 Ed. 1.0 b:2006
Connectors for electronic equipment - Tests and measurements - Part 13-5: Mechanical operation tests - Test 13e: Polarizing and keying method
Details a standard test method to assess the capability of polarizing and or keying of connectors to allow intended mating and prevent unintended mating.
International Electrotechnical Commission [iec]