Final answer:
The color code for the Neutral wire in Single Phase and 3 Phase systems is usually blue, black, or white, but it is essential to verify the color codes used in your specific region as they can vary internationally.
Step-by-step explanation:
The Single Phase and 3 Phase color code for Neutral is typically blue, black, or white. However, insulation color-coding for live/hot, neutral, and ground wires can vary significantly around the world. It is critical to confirm the color code standards in your specific location. Generally, the earth/ground wire is identified as green, yellow, or a bare wire without insulation. Notably, the neutral wire should have a low-resistance path to the earth, making it safe to touch and acting as the return path for the current to complete the circuit.
In the context provided, which refers to a three-wire system with a three-prong plug, the neutral wire is also referred to as being at zero volts due to its connection to the earth at both the voltage source and user location. This is a safety feature designed to prevent electric shock. It is worth emphasizing that the color coding system, especially for the neutral wire, is designed to be consistent to ensure safety and the effective functioning of electrical systems.