Mains Electricity

• What is the main electrical connection for most applications?

  Three-core cable
• What is the purpose of the insulation covering each wire?

  For easy identification of wires
• What color code represents the live wire?

  Brown
• What color code represents the neutral wire?

  Blue
• What color code represents the earth wire?

  Green and yellow stripes
• What happens if the live wire touches the neutral wire?

  It creates a short circuit
• What is the potential difference between the live wire and earth?

  About 230 V
• What is the role of the neutral wire?

  It carries current away from the appliance
• What occurs when touching the live wire?

  It results in an electric shock
• How does the earth wire function in a circuit?

  It prevents electric shock by directing current to the ground
• How do neutral and earth wires differ in terms of danger?

  Neutral wires are not dangerous, earth wires are safe
• What happens if there is a fault in the live wire?

  It can lead to a dangerous electric shock
• What is the consequence of touching a live wire?

  It completes a circuit through the body
• Why are neutral and earth wires considered safer than live wires?

  They do not carry a dangerous voltage
• What is the effect of a fault in the neutral wire?

  It can cause appliances to malfunction
• What are the key differences between live, neutral, and earth wires?

  • Live wire: carries current to the appliance, dangerous voltage
  • Neutral wire: carries current away, safe under normal conditions
  • Earth wire: safety wire, directs current to ground
• What are the safety measures associated with electrical wiring?

  • Use of insulated wires
  • Color coding for identification
  • Earth wire for safety
  • Circuit breakers to prevent overload