Three Phase Wire Color Code for Low and High Voltage from NECĪnother common wire color code for three-phase systems is that of the International Electrotechnical Commission, more commonly known as IEC. For example, In the USA, the National Electric Code (NEC) is different for low voltage (120/208/240V) and high voltage (277/480V) as the table shows. Thus, it is necessary to be abreast with whatever standard in use to avoid the catastrophic effects of misconnection. Even within the same region/standard there could be a variety in color codes between single phase and three phase, as well as between high and low voltage.
One color in a certain region could have a different implication in another region. Wire color codes vary according to the region in line with the governing standard. In this article, we will review what the three-phase wire color code is, its benefits, and frequently asked questions on the concept.
The configuration uses three live lines, a ground wire, and a neutral wire at times. Three-phase supply uses either four or five wires. Electrical wire color code for three-phase applications provides a standard means of identifying individual wires.
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