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 These systems use other color codes Photo 1 shows a panel fed by a 81 volt threephase electrical system, using black, red, and blue for This is a really tough area as color codes can be so different per user area Continentally Speaking , and as far as being within the USA, 1/8 3 Phase 4 Wire (Wye) L1=Black, L2=Red, L3=Blue, Common=White, EGC=Green, IGC=Green w/yellow stripes,IEC Wiring Color Codes for AC – UK , EU & Other Countries As mentioned above, most of the Europe Union countries and UK, China, Russia, Hong Kong, Singapore, Ukraine, Belarus, Kazakhstan, Israel, Turkey, Argentina, South Africa, KSA (Saudi Arabia), UAE (United Arab Emirate) and Malaysia are following the IEC "International Electrotechnical Commission" wiring codes Electrical Wiring Wire Color Codes Creative Safety Supply What is 120/208