Relevant topics on |
Electrical installations |
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Wiring practice by region or country |
Regulation of electrical installations |
Cabling and accessories |
Switching and protection devices |
Flexible cable (e.g., extension, power, and lamp cords) | |||
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Region or country | Phases | Neutral | Protective earth/ground |
Argentina, European Union, South Africa (IEC 60446) | |||
Australia, New Zealand (AS/NZS 3000:2007 3.8.1, 3.8.3) | , (previously), 'any colour other than green, yellow, green/yellow, black or light blue' | , (previously) | , (previously) |
Brazil[6] | , , , , , Any color may be used for flexible cable phases, excluding green and green/yellow striped. For safety reasons, yellow should not be used when green/yellow striped cables are present. Blue can be used for phases inside flexible cables when no neutral is present. | (light blue) | , |
China (PRC) | , , | , | |
United States, Canada (120 V) | metallic brass | metallic silver | , ; , green/yellow striped |
United States, Canada (split-phase 240 V)[7] | , | , ; , green/yellow striped | |
Fixed cable (e.g., in-, on-, or behind-the-wall cables) | |||
Region or country | Phases | Neutral | Protective earth/ground |
Argentina; China; European Union (IEC 60446) from April 2004; the United Kingdom from 31 March 2004 (BS 7671); Hong Kong from July 2007; Singapore from March 2009; Russia since 2009 (GOST R 50462); Ukraine, Belarus, Kazakhstan | , , | [b] | |
India, Pakistan; United Kingdom, prior to 31 March 2004 (BS 7671); Hong Kong, prior to 2009; Malaysia and Singapore, prior to February 2011 | , , |
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Australia, New Zealand (AS/NZS 3000:2018 3.8.1, table 3.4) |
| [c] | (since about 1980 – Stranded Wire) (since about 1966 – Stranded Wire) Stranded Wire – no insulation; sleeved at the ends (previously)[d] |
Brazil | , , , , , Any color may be used for fixed cable phases, excluding blue, green and green/yellow striped. For safety reasons, yellow should not be used when green/yellow striped cables are present. | (light blue) In installations where neutral also serves as protective ground, light blue wires with green/yellow striped terminal markings should be used. | , |
China (PRC) | , , | , | |
South Africa | [b] | ||
United States[e] | , , for 120, 208, or 240 V , , for 277, or 480 V metallic brass | for 120, 208, or 240 V for 277, or 480 V metallic silver | no insulation required for isolated systems |
Canada[8][e] | , for single-phase systems , , for three-phase systems | , | , no insulation |
, for isolated single-phase systems , , for isolated three-phase systems | , for isolated systems | ||
Boxes (e.g., translucent purple) denote markings on wiring terminals.
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