F.3 Mains Electricity & Household Wiring

• yellow and green blue brown

• brown blue yellow and green

• yellow and green brown blue

• blue brown yellow and green

• neutral live earth

• earth neutral live

• live earth neutral

• live neutral earth

• Its voltage alternates between 220 V and 0 V periodically.

• It is blue in colour.

• A fuse is fitted in it.

• The current flows through it in one direction only.

• Its voltage is always 0 V.

• It is green in colour.

• A fuse is fitted in it.

• No current flows through it.

• It is a safety wire.

• It is yellow and green in colour.

• It is connected to the metal body of an electrical appliance.

• An alternating current flows through it under normal conditions.

• All the holes are normally closed with shutters.

• The neutral hole is connected to the earth hole directly.

• The live hole is fitted with a fuse.

• The earth wire is connected first when a three-pin plug is plugged into the socket.

• Keep appliances in stand-by mode when not in use at night.

• Use energy-saving light bulbs instead of filament bulbs.

• Maintain appliances properly for optimum performance.

• Turn the light off when nobody is in the room.

• X Z Y

• Y X Z

• Z Y X

• Y Z X

• A circuit breaker can cut off a current if it is too large.

• A circuit breaker can be reset easily.

• A circuit breaker is cheaper.

• A circuit breaker is more commonly seen.

• 5 A.

• 10 A.

• 15 A.

• 20 A.