Mains electricity in the home

3 wires, earth wire, neutral wire and live wire
1. Earth wire (green and yellow) if there is a fault and the case becomes live, current passes along this wire, making the device safe
2. Live wire (brown) provides energy to the device. Has a potential difference of 230v
3. Neutral wire (blue) completes the circuit. Has a potential difference of 0v
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

Resource summary

	Created by ryansimon over 12 years ago