Electricity in our homes

• What is our homes Mains supplies electricity type and what are battery electricity types?

  -Our mains power supply is an ac (Alternating current)

  -Batteries are DC (Direct current)
• What is the Voltage level supplied to homes in the UK?

  230V
• What is the frequency of the a.c supply to homes in the UK?

  50 Hz
• What does a UK cable look like? (DONT LOOK AT IMAGE)

  -They consist of 3 wires

  -Earth wire - Green and yellow - For protecting wiring and for safety. Stops appliance casing from becoming live. At 0V but changes when there's a fault

  -Live Wire - Brown - The live wire provides the alternating pd of 230V

  -Neutral wire - Blue - Completes the circuit and carries away current

  
• What wire is missing in other cables around the world e.g American?

  -The earth wire
• The live wire is that one that can induce an electric shock if you come into contact with it