JAMES: So a plug has three main copper wires ... ELLIE: So what the earth wire does is direct the electric current to the ground instead of to the person touching the appliance.

It works by burying a metal plate or rod directly into the earth and connecting with a heavy wire to the rest of the system. It provides a pathway for electricity to flow back to the earth ...

The power input for households is ac as ... The plug contains three wires – the live, neutral and earth wires. In a plug, the live wire (brown) and the neutral wire (blue) are the two wires ...