Plugs and wires

• What are the different wires found in plugs and cables?

  Live wire, neutral wire, earth wire
• Why can touching the wrong wire give you an electric shock?

  It can cause a current to flow through you
• Where does the majority of electricity in the UK come from?

  The national grid
• What is the main supply voltage in the UK?

  230 volts
• What is the frequency of the alternating current in the UK?

  50 hertz
• What does a three core cable contain?

  Three wires: live, neutral, earth
• What material are the wires in plugs made of?

  Copper
• Why are the wires coated in insulating plastic?

  For safety to prevent electric shocks
• What color is the live wire?

  Brown
• What is the function of the live wire?

  Provides alternating potential difference
• What color is the neutral wire?

  Blue
• What does the neutral wire do?

  Completes the circuit by carrying away current
• What color is the earth wire?

  Striped green and yellow
• What is the role of the earth wire?

  Stops appliance casing from becoming live
• Why does the earth wire not normally carry a current?

  It has a potential difference of zero volts
• How does the earth wire prevent electric shocks?

  Provides an alternative pathway for current
• Why does electricity flow from the live wire to the neutral wire?

  Due to the difference in voltage
• What happens if a person touches the live wire?

  It causes a large current to flow through them
• Why is it important to never touch plug sockets?

  They can still have a potential difference
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  Like and subscribe
• What is the potential difference of the neutral wire?

  Zero volts
• What is the potential difference of the earth wire?

  Zero volts
• What could happen if the live wire touches the appliance casing?

  The casing could become live and shock someone
• How does the potential difference affect the flow of electricity?

  It creates a current flow between wires
• Why is it dangerous to touch a plug socket even when switched off?

  It may still have a potential difference
• What is the risk of touching a live wire?

  It can result in an electric shock
• What is the main purpose of the earth wire?

  To provide safety by preventing electric shocks
• How does the earth wire function during a fault?

  It directs current away from the user
• What happens to the current if the live wire is disconnected?

  The current will stop flowing
• What is the role of the neutral wire in a circuit?

  To carry current away from the device
• What is the significance of the color coding of wires?

  It helps identify the function of each wire
• What is the potential difference of the live wire?

  230 volts
• What is the consequence of a loose live wire touching the casing?

  It can electrify the casing
• Why is it crucial to understand the wiring in plugs and cables?

  To ensure safety and prevent electric shocks