1. The 13 Amp PLUG Fuse Insulating Casing Live Wire Neutral Cable grip Flexible Copper conductors Earth

2. FUSES IN ACTION fault Extra current melts the 5 Amp fuse wire cutting off the live supply Fuses are the weakest link in a circuit, preventing fires. They consist of a short, thin piece of wire with a low melting point.

3. EARTH & FUSE

4. L N The earth wire and fuse

5. L N - - - - - - - - - Fault- Loose wire The earth wire and fuse

6. L N - - - - - - - - - Fault- Loose wire The earth wire and fuse

7. L N E The earth pin is connected to the metal case via the yellow /green earth wire If a fault develops a larger current can flow down the earth wire and melt the fuse wire cutting off the supply on the LIVE wire The earth wire and fuse

8. 321 Errors in Wiring Plugs

9. 321

10. 321

11. 321 1. Bare wires showing 2. Proper fuse not installed 3. Earth wire not connected Errors in Wiring Plugs

12. 321 4 5 1. Bare wires showing 2. Proper fuse not installed 3. Earth wire not connected

13. 321 4 5 1. Bare wires showing 2. Proper fuse not installed 3. Earth wire not connected 4. Live and neutral swapped Errors in Wiring Plugs

14. 321 4 5 1. Bare wires showing 2. Proper fuse not installed 3. Earth wire not connected 4. Live and neutral swapped 5. Loose cable grip

15. Why are sockets wired in parallel with each other ? The longest pin of a plug is designed to make contact with the earth wire A ring main circuit

16. FUSES, EARTH WIRE AND PLUGS Wet hands have a much lower resistance. If your body has a resistance of 100  and you touch a live wire at 230V, what happens?

17. Safety with mains electricity * Replace broken plugs and frayed cables * Keep plugs & cables away from water or heat * Never overload a plug or socket * Don’t use wet hands when switching on or off Appliances with plastic cases do not need an earth wire Why not? The insulating plastic prevents users getting into contact with ‘Live’ components

18. Circuit breakers work quicker than fuses. ( saves lives) CIRCUIT BREAKER

19. They are easily reset by pressing a button CIRCUIT BREAKER

20. neutral live parallel earth series melts Brass – stiff, good conductor Copper – malleable, good conductor rubber – flexible, good insulator Stiff plastic – tough, rigid, good insulator

21. 1a. A Fuse cuts off the supply if there is excessive current caused by a fault. 1a. A fuse is on the live side so that the appliance remains safe from the live voltage. 1a Circuit breakers work quicker than fuses.( saves lives) yes The off switch should prevent the live voltage reaching the element New switch location

23. melts