Explanation:

Three Core Flexible Cable:
- A three core flexible cable typically consists of three conductors - live, neutral, and earth.

Colour of the Neutral:
- In the case of a three core flexible cable, the colour of the neutral conductor is blue.
- The colour coding for electrical wiring is standardised to ensure safety and consistency in electrical installations.
- The neutral conductor is typically identified by its blue colour in three core flexible cables.

Significance of Colour Coding:
- Colour coding helps electricians and individuals working with electrical systems to easily identify different conductors.
- It also helps in preventing errors and ensuring that connections are made correctly.

Other Conductor Colours:
- The live conductor is often coloured brown in electrical wiring.
- The earth conductor is typically coloured green and yellow striped to signify its protective grounding function.

Importance of Neutral Conductor:
- The neutral conductor completes the circuit and provides a return path for current flow in an electrical system.
- It is essential for the safe operation of electrical devices and equipment.

Conclusion:
In a three core flexible cable, the neutral conductor is identified by its blue colour. Understanding colour coding in electrical wiring is crucial for ensuring proper installation and safety in electrical systems.