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The wire color codes followed in USA for AC Supply may be categorized in three sub-categories depending on the nature and range of AC supply.

USA Wire Color Codes for DC Supply USA Wiring Color Codes for AC Supply.

However, as per local practice, the standard wiring color codes may be divided in two main categories. Any other colors except these may be used for other power lines. NEC defines White or Grey color for neutral wire and green/ green with yellow stripe/ bare copper for ground wire.

These are typically used for power wires in “branch circuits”.

1 – Wiring Color Codes Wiring Color Codes in United States of America (USA)Īmerican electrical contractors and electricians must comply with the National Electrical Code (NEC) for the color coding of wires. But here is a useful guide to the significance of different colors used in different parts of the world for common types of AC (alternating current) electrical wiring.įig. Therefore, the significance of any given wire color may vary from country to country. In some countries, the applicable governing body specifies all permissible wiring colors, but in others only a few specific types of wiring are required to have specific colors. It’s a standardization which is followed in regions for better understanding and trace-ability. When to Apply Wiring Color Codes to Wire What are Wiring Color CodesĮach color used for electrical wiring tells us the type and purpose of the wire.Wiring Color Codes in Europe (IEC) for DC Supply.Wiring Color Codes in Europe (IEC) for AC Supply.Wiring Color Codes in Europe including UK (IEC).277/480 Volt AC Wiring Color Codes in USA.120/208/240 Volt AC Wiring Color Codes in USA.Wiring Color Codes in United States of America (USA).