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Mains electricity in the home
- 3 wires, earth wire, neutral wire and live wire
- Earth wire (green and yellow) if there is a fault and the case becomes
live, current passes along this wire, making the device safe
- Live wire (brown) provides energy to the device. Has a potential difference of 230v
- Neutral wire (blue) completes the circuit. Has a potential difference of 0v
- Earth wire (green and yellow) if there is a fault and the case becomes
live, current passes along this wire, making the device safe
- It is safe to use two core cables when the case itself is an insulator. It could be
used safely in plastic kettes, hair dryer and a t.v.
- If the diameter of a cable is smaller then the current cant flow as
much and it will also heat up quicker which could cause a fire
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