Australian 3-Phase Colour Code Standard
Answer : It seems these are the new colour standards for equipment, based on the most recent National Electrical Standards as of 2010 thru 2017. I have confirmed they are accurate. New cable colour code for Three Phase Phase 1 - Brown Phase 2 - Black Phase 3 - Grey Neutral - Light Blue Earth - Green/Yellow FWIW For three phase wiring, our standard colours are: Phases: Red, White, (dark) Blue Neutral: Black Earth: Green/Yellow For example, any three-core (3C+E) or four-core (4C+E) power cable bought in Australia would follow the above colour codes. These colours are strongly advised, but not mandatory. The internal wiring of equipment may come with European colour codes (brown, gray, black, blue) - this is permissible by AS 3000. The wiring may also come with no colour code at all. For example, all the wiring might be gray, with wires identified by numbers or labels - this is also permissible by AS 3000. German equipment, in particular, often ...