Fuses and Circuit Breakers

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  • Created by: Olivia
  • Created on: 24-12-13 15:34

Earthing and fuses prevent fires and shocks

  • If a fault develops in which the live somehow touches the metal case, then because the case is earthed, a big current flows in through the live, hrough the case and out down the earth wire
  • This surge in current blows the fuse (or trips the circuit breaker) which cuts of the live supply
  • This isolates the whole appliance, making it impossible to get an electric shock from the case…


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