Some of the well known are NEC “National Electrical Codes” followed by US and Canada while IEC “International Electrotechnical Commission” codes followed by UK, Most of the European Countries Argentina etc. There are multiple colors used for different wires and cables in different regions for AC (alternating current) Single-Phase, Three-Phase and DC (Direct Current) for design and installation based on the local codes, rules and regulations. Related Post: ABYC Cable & Wire Color Codes for Yacht, Boat & Marine Wiring.The proper wiring color codes used in the installations is a best strategy for lines, neutral and ground wire tracing, time-saving, easy maintenance/troubleshooting and protection for those who are working on it. Some of the power wires and cables color codes are mandatory while others are optional. AC Single Phase & Three Phase And DC Wire & Cable Color CodesĮlectrical engineers, contractors, traders, manufacturers and especially electricians around the world use different electrical wiring color codes for cable and wire installation and electricity distribution in industrial buildings or residential homes.