Live wires carry electric current toward a device, such as a main-powered appliance, while neutral wires carry electric current away from the device to close an electric circuit. Live wires are typically blue in color, while neutral wires are usually brown.
An electric current refers to the movement of an electrical charge along a conductor. The amount of electrical flow depends on voltage and resistance, which is mathematically represented by the equation I = V/R, where I denotes electric current, V represents voltage and R indicates resistance.
In electrical appliances, three types of wires are commonly used for safety purposes, which include live, neutral and earth wires. When the appliance is in good working order, earth wires are not necessary. However, faulty live wires require earth wires to discharge a large amount of electric current.