Electricity
© PDST Home Economics
TASK!!!!
Make a list of all
electrical appliances
you have in your home
Electricity Sources
• Electricity is generated at power stations from
1. Coal
2. Oil
3. Peat
4. Water
• Electric metre records the amount of electricity used
in units
• Second metre in some homes which use off peak
Nightsaver Electricity
Cables pass from consumer unit bringing power to each room
Consumer
Unit
• Flexes of appliances have at least 2 wires or cores
1. Live Wire : (Brown)
Bringing electricity TO the appliance
2. Neut...
• Any appliance with only 2 wires must be doubly
insulated and carry the symbol shown
• Most appliances have 3rd
Wire call...
Lively Brown Bear
Jumped on earthy green grass
Under a neutral blue sky
Possible Faults
• Overloading a circuit by using too many
appliances/overloading adaptor
• Short Circuit – a live and neut...
Fuse
• Safety device
• Deliberate weak link in wiring system
• Melts when fault occurs
• Disconnects Electricity and so pr...
HOMEWORK
1. State the name, colour and function of the three
wires in a plug
2. What is the purpose of a fuse?
3. Compose ...
Electricity 2
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Electricity 2

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Electricity 2

  1. 1. Electricity © PDST Home Economics
  2. 2. TASK!!!! Make a list of all electrical appliances you have in your home
  3. 3. Electricity Sources • Electricity is generated at power stations from 1. Coal 2. Oil 3. Peat 4. Water
  4. 4. • Electric metre records the amount of electricity used in units
  5. 5. • Second metre in some homes which use off peak Nightsaver Electricity
  6. 6. Cables pass from consumer unit bringing power to each room Consumer Unit
  7. 7. • Flexes of appliances have at least 2 wires or cores 1. Live Wire : (Brown) Bringing electricity TO the appliance 2. Neutral Wire: (Blue) Taking the return current
  8. 8. • Any appliance with only 2 wires must be doubly insulated and carry the symbol shown • Most appliances have 3rd Wire called Earth Wire (Green/yellow) – brings current safely to the earth if a fault occurs and not through the person using the appliance
  9. 9. Lively Brown Bear Jumped on earthy green grass Under a neutral blue sky
  10. 10. Possible Faults • Overloading a circuit by using too many appliances/overloading adaptor • Short Circuit – a live and neutral wire touching in wiring/ incorrectly wired plug • Overheating – due to faulty thermostat
  11. 11. Fuse • Safety device • Deliberate weak link in wiring system • Melts when fault occurs • Disconnects Electricity and so prevents a fire • Found in 3 pin plug and fuse box • Modern fuse boxes use circuit breakers
  12. 12. HOMEWORK 1. State the name, colour and function of the three wires in a plug 2. What is the purpose of a fuse? 3. Compose five safety rules to follow when using electricity in the home?

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