Electrical cables carry electric currents, and every cable has an assembly of one or more wires that helps the cable to transfer electrical power from one device to another. Wires are usually made of either bare copper or copper thinly plated with another metal like silver. The wires are often bonded, twisted or braided together within the electrical cable to create an assembly of wires. As cables can be used for a wide array of purposes, each type of cable has to be customised to fit a specific purpose. Electrical cables can be found everywhere, in both homes and industrial areas, as they are needed to power or signal the circuits in electronic devices.
All the wires within a cable must be insulated, and the type of insulation will determine the voltage rating and maximum temperature of the cable. The voltage rating refers to the maximum voltage the cable can handle, while the temperature rating refers to the maximum operating temperature of the cable. If the voltage rating and temperature rating are exceeded, the insulation within the cable will likely be damaged, resulting in a short circuit or a fire.
The outer insulation of an electrical cable can come in different colours, and it is essential to remember what each colour represents, as all of them have a different purpose. In Singapore, the red colour used to represent the phase conductor, although the brown colour replaced it due to the amended international regulations. For a three-phase conductor, brown, black and grey are used to represents each of the three lines. The neutral conductor is in blue, while the protective conductor (earth) is in green and yellow. All new electrical wirings in Singapore from 1 March 2011 onwards are required to follow the amended regulations.
A range of electrical cables can be purchased at Max Cable. Contact us for a quote today!