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| Question | Answer |
| How many Wires do Ring Main Circuits consist of? | Three Wires: - Live Wire - Neutral Wire - Earth Wire |
| What does the Live Wire do? | It provides the path along which the Electrical Energy from the Power Station travels |
| What does the Neutral Wire do? | It completes the circuit |
| What does the Earth Wire do? | The Earth Wire usually has no current in it. It is there to protect you if an appliance develops a fault. It provides a path for current to escape without passing through the user |
| What is the advantage of Ring Main Circuits? | Ring Main Circuits provide a way of allowing several appliances in different parts of the same room to be connected to the mains using the minimum amount of wiring. |
| How much is the Voltage of the Mains Electricity supplied to homes in many countries? | The Mains Electricity supplied to homes in the UK, China, India, and many other countries is between 220V and 240V. |
| What happens if you come into contact with Mains Electricity? | You could receive a severe electric shock, which might even be fatal. |
| How is the Electric Shock caused by touching the Mains Electricity is prevented? | The outer part of a plug called the casing is made from plastic, which is a good insulator. |
| How are the plugs connected to the Mains Electricity. | Connections to the circuits are made via three brass pins, as the metal 'brass' is an excellent conductor. |
| What does the fuse contain? | The Fuse is usually in the form of a cylinder or cartridge, which contains a thin piece of wire made from a metal that has a low melting point. |
| What happens when too large a current is in the circuit? | The Fuse wire becomes very hot and melts. The Fuse 'blows'. The circuit is now incomplete so there is no current. |
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