P2 - Mains Electricity

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  • Created by: EllenMIW
  • Created on: 16-12-15 17:42
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  • Mains Electricity - P2
    • 3 pin plug
      • Wires
        • Brown=Live
          • Potential alternates +325 to -325
        • Yellow/green=earth
        • Blue=neutral
          • Conducts electricity, 0V
        • Copper
          • Good conductor
          • Malleable
      • Brass pins
        • Good conductor
        • No rust
        • Strong
      • Rubber insulating material
      • Stiff plastic casing
    • RCCB
      • Residual Current Circuit Breaker
      • An electromagnet that switches off the current if the live current and neutral current differ by more than 30mA
      • Advantages
        • Faster than fuse
        • Reset after tripped
    • Double Insulation
      • Vacuum cleaners, electric drillls
      • No earth wire
      • Insulation on case and cable
    • Key definitions
      • Current
        • A measure of the number of electrons passing through an electrical appliance in 1 second
      • Potential difference
        • A measure of the energy transferred by each electron
      • Power
        • Energy transferred every second
    • Is an alternating current supply
      • Changes direction

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