The mains supply is delivered to houses using a three core wiring called the live neutral and the earth . The live wire is brown in colour and brings in the current. the neutral coloured Blue is the return wire . The earth is coloured green or yellow. These wire supply electricity to separate circuits within the house . Two separate circuit are used. One of 15A for Appliance with higher power ratings and the other of 5A ratings for others . The earth wire is usually connected to a metal plate deep in the earth near the house. It is safety measure and does not in any way affect the supply .
Electric Appliances mainly used at home