What are the colors of SWA 4 core cable?

What are the colors of SWA 4 core cable?

SWA 4 core cable, also known as steel wire armoured cable, is a type of electrical cable that is widely used for power transmission and distribution. This robust and durable cable consists of four conductors, each color-coded to relay specific information. Let's delve into the colors found in SWA 4 core cable and their significance.

1. Brown: The primary function of the brown conductor in SWA 4 core cable is to carry the live or phase current. This current, typically at 230 volts in domestic installations, is responsible for supplying power to electrical appliances and devices. The brown conductor connects to the live terminal in sockets, switches, and other electrical fittings.

2. Blue: The blue conductor in SWA 4 core cable serves as the neutral wire. It completes the circuit by providing a return path for the current back to the source. The voltage potential of the blue wire is close to zero, ensuring the safety of individuals handling electrical equipment. Blue wires are connected to the neutral terminal in electrical fittings.

3. Green and Yellow: These colors are associated with the protective earth or ground wire. Green and yellow stripes run along the length of the third conductor in SWA 4 core cable. The main purpose of this wire is to provide a safety path for electrical faults, such as short circuits, by directing the excess current to the ground. Proper grounding ensures the protection of individuals and equipment from electric shocks.

4. Black: In certain SWA 4 core cable applications, a fourth conductor can be found, typically colored black. This conductor is known as the line wire and is used for specific wiring configurations, such as three-phase systems. Three-phase power is commonly used in industrial settings where high power demands are required. The black conductor allows for the distribution of power to multiple phases, ensuring a balanced power supply.

In conclusion, the colors of SWA 4 core cable play a vital role in electrical installations. The brown wire carries the live or phase current, the blue wire acts as the neutral, and the green and yellow striped wire corresponds to the protective earth or ground. Additional black conductors may also be present for specific wiring configurations, such as three-phase systems. Understanding the colors of SWA 4 core cable is crucial to ensure the safe and efficient transmission of electrical power.

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