What is the colour code for the insulation on the
earth wire

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the color code used for the insulation on the earth wire in electrical circuits.

2. **Identifying the Color Code**: In electrical wiring, different wires are insulated with specific colors to indicate their function. The earth wire is one of these wires.

3. **Recalling the Color for Earth Wire**: The standard color code for the insulation on the earth wire is green.

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