In a 240-volt circuit, what color is typically used for a second live wire?

In a typical 240-volt circuit, the second live wire is identified by the color red. This convention is part of the standardized color-coding system used in electrical wiring. In most wiring systems, black is commonly used for one of the live conductors, while red serves as the second live wire. This distinction is crucial for ensuring proper connections and safety when installing or servicing electrical equipment.

Understanding the color-coding is vital for electricians and technicians, as it helps them to correctly identify and manage live wires, reducing the risk of accidental shorts or electrical shocks during maintenance or installation work. While blue and yellow are also used in some systems, they typically signify different conductors, such as neutral or phase conductors in specific applications. Therefore, red is the correct and standardized choice for the second live wire in a 240-volt circuit.