.
| L1 | L2 | L3 | Neutral | Ground/ protective earth |
|
|---|---|---|---|---|---|
| Australia and New Zealand (per AS/NZS 3000:2007 Figure 3.2) | Red1 | White1 (prev. yellow) | Dark blue1 | Black1 | Green/yellow striped (green on very old installations) |
| Canada (mandatory)[5] | Red | Black | Blue | White | Green or bare copper |
| Canada (isolated three-phase installations)[6] | Orange | Brown | Yellow | White | Green |
| European Union and all countries who use European CENELEC standards April 2004 (IEC 60446), Hong Kong from July 2007 | Brown | Black | Grey | Blue | Green/yellow striped2 |
| Older European (IEC 60446, varies by country3) | Black or brown | Black or brown | Black or brown | Blue | Green/yellow striped3 |
| UK until April 2006, Hong Kong until April 2009, South Africa, Malaysia, Singapore | Red | Yellow | Blue | Black | Green/yellow striped (green on installations approx. before 1970) |
| Republic of India and Pakistan | Red | Yellow | Blue | Black | Green |
| People"s Republic of China (per GB 50303-2002 Section 15.2.2) | Yellow | Green | Red | Light blue | Green/yellow striped |
| Norway | Black | White/Grey | Brown | Blue | Yellow/green striped, older may be only yellow or bare copper |
| United States (common practice)4 | Black | Red | Blue | White, or grey | Green, green/yellow striped or a bare copper wire |
| United States (alternative practice)5 | Brown | Orange(delta) Violet(wye) | Yellow | Grey, or white | Green |
^1 In Australia and New
