What colour is the neutral wire in an electrical circuit?

The neutral wire in an electrical circuit is typically identified by the color white. This color designation helps electricians and technicians easily recognize the different types of wires and their functions within an electrical system. The neutral wire serves as a return path for electric current, balancing the electrical load and ensuring the safe operation of the circuit.

In residential wiring systems, the consistent use of white for neutral wires allows for clear and standardized practices that contribute to overall safety and efficiency in electrical installations. By adhering to these color codes, workers can avoid potential hazards and ensure proper connections, making it easier to troubleshoot and maintain electrical systems.

The other colors listed in the question—red, blue, and black—are generally used for different purposes, such as hot wires or secondary phases in three-phase systems, which further reinforces why recognizing the color white as the neutral wire is essential in electrical work.