Wiring Color Codes in Europe, including the UK (IEC)
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Most European countries follow a wire color code established by the International Electro-technical Commission (IEC). This article is for reference only. Please refer to local regulations.
Wiring Color Codes in Europe (IEC) for AC Supply
Wire Color Codes in Europe (IEC) for AC supply are as follows:
Single Phase, Line (Hot) – Brown
3 Phase, Line 1 – Brown
3 Phase, Line 2 – Black
3 Phase, Line 3 – Grey
Neutral – Blue
Ground – Green with Yellow Stripe
Wiring Color Codes in Europe (IEC) for DC Supply
European (IEC) Wire Color Codes for DC Supply are as follows:
- 2 Wire Ungrounded DC Supply
Positive (+ve) – Brown
Negative (-ve) – Grey
- 2 Wire Grounded DC Supply
Positive (+ve) of Negative (-ve) grounded circuit – Brown
Negative (-ve) of Negative (-ve) grounded circuit – Blue
Positive (+ve) of Positive (+ve) grounded circuit – Blue
Negative (-ve) of Positive (+ve) grounded circuit – Grey
- 3 Wire Grounded DC Supply
Positive (+ve) – Brown
Mid Wire (Centre Tap) – Blue
Negative (-ve) – Grey
- Common
Ground – Green with Yellow Stripe
