The mandatory colors for power wiring in the National Electrical Code (NEC) are Green, Bare, or Green/Yellow (a yellow stripe or band on green) for the protective ground (PG), and White (or alternatively Gray) for the neutral wire. For typical building AC circuits (commonly up to 600 volts nominal), the NEC specifies identification rules for grounded conductors (neutral), requirements. Many countries, including the UK (BS-7671), China, Russia, Hong Kong, Singapore, Ukraine, Belarus, Kazakhstan, Turkey, Israel, South Africa, Argentina, Malaysia, Saudi Arabia (KSA), and the UAE, have adopted the IEC wiring color codes. We will also examine the wiring color codes used in other. Colour identification by using common colours is permitted, provided that there is no risk of confusion and no GREEN or YELLOW is used, except in the two-colour combination GREEN-YELLOW. It works like a “language” for wires. With clear color differences, it ensures safety, efficiency, and accuracy in electrical installation, maintenance, and repair.
