PROGRAM
Electrical wiring
Electrical wiring is an electrical installation of cabling and associated devices such as switches, distribution boards, sockets and light fittings in a structure.
Wiring is subject to safety standards for design and installation. Allowable wire and cable types and sizes are specified according to the circuit operating voltage and electric current capability, with further restrictions on the environmental conditions, such as ambient temperature range, moisture levels, and exposure to sunlight and chemicals.
Associated circuit protection, control and distribution devices within a building's wiring system are subject to voltage, current and functional specification. Wiring safety codes vary by locality, country or region. The International Electrotechnical Commission (IEC) is attempting to harmonise wiring standards amongst member countries, but significant variations in design and installation requirements still exist.
Flexible cable (e.g., extension, power, and lamp cords) | |||
Region or country | Phases | Neutral | Protective earth/ground |
Argentina, European Union, South Africa (IEC 60446) | |||
Australia, New Zealand (AS/NZS 3000:2007 3.8.3) | (previously) | (previously) | |
Brazil | (previously) | ||
United States, Canada (120 V) |
metallic brass |
metallic silver |
green/yellow striped |
United States, Canada (240 V) |
Line 1, Line 2 |
(Needed only if 120 V also is required.) |
green/yellow striped |