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The standard for electrical wiring color code in India is as follows. Only White is used for Neutral conductor and Green and bare conductor is used for protective ground. The color code practice is very similar to that of the US because of the harmonization effect. The Canadian Electric Code governs the electrical wiring color code for Canada. The old color code in UK (until 2004) is shown below. Before that, it had its own code for electrical wiring. UK started using the IEC code from March, 2014. In the old IEC color code, all the lines in three phase supply are either brown or black. But from March, 2004, the UK started following the IEC color code. United Kingdom had its own color code until 2004. Most of the European Countries follow the International Electro-technical Commission’s electrical wiring color code. IEC Color Code for most of the European Union (Including UK from 2004) In case of single phase power supply, Black wire is used as the line wire and in case of 220V supply, Red wire is used as the secondary line conductor. In three phase power supply, the combination of Black, Red and Blue wires for power conductors are used for 120/240V AC whereas the combination of Brown, Orange and Yellow wires for power conductors are used for 277/480 V AC. The common color code for three phase in, on or behind the wall electrical wiring is shown below. Apart from these mandatory colors, any color can be used for line or hot power conductors.
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The United States National Electrical Code (US NEC) has made mandatory color code for neutral power conductors and protective ground conductor.
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In case of a three phase power supply, there are three wires for lines, one for neutral and one for protective ground. In case of a single phase power supply, there are three wires one each for line, neutral and protective ground. We know that the power can be in either single – phase or three – phase.ĭepending on the phase of the power supply, different colored wires are used for different voltages. But a general color code is used to identify different types of conductors which are used in electrical wiring. An electrical wire is a single solid or twisted Copper or Aluminum conductor with or without any insulation.Įach wire used for electrical wiring is marked with information like wire gauge, ampacity, maximum voltage, and maximum temperature. The collection of Electrical wiring and electrical devices like switches, sockets, meters and fittings is called Electrical Installation or Building Wiring.
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In order to use the electricity in our homes, a proper wiring is required. Once it is distributed to our homes, we can use it to power up different appliances. They are generation of electricity at power plants, transmission of the generated power through transmission lines and distribution at the residence and industries. The electric power that we use at our residence is generated at a distant power plant.Īctually, in order to use the electric power at our homes, three important process are involved. We use electricity for residential, industrial, commercial, transport etc. It is an essential part of modern life and the economy of a country depends on it. Electricity is one of the important types of energy and power that we use in our daily lives.