Most electrical appliances are connected to the mains using a three-core cable.
Complete the table to give the colour of the insulation around each of the three wires.
Table: The colour of the insulation around each wire in a three-core mains cable
| Wire | Colour of insulation |
|---|---|
| Live | |
| Neutral | |
| Earth |
Give the job of the neutral wire in a mains circuit.
The earth wire of a mains appliance normally carries no current.
Write down when the earth wire does carry a current.