Question

When the live and neutral wires melt and come in contact with each other , it is said that both ,the live and neutral , wires carry current to the appliance ,Why? If the live is connected to the neutral ,the current should pass directly through the neutral wire and never reach the appliance ?

Answer 1

If the live wire directly come to the neutral wire it is the condition of short circuit. Theoretically(ideally) it cause a infinity current but in our practical condition every conductor have some resistance so it will cause a large amount of current through it if there is no any protection it will heat up the conductor up to melt it. In case of Normal wire the wire will burn and then the circuit break and all things become normal except that conductor or wire

without a neutral wire, the voltage accross each load and the voltage between phases would be different, which is not ideal for both the consumer and the electrical system as it results in an imbalance of the electrical distribution system. Loads with greater impedance would require a larger volt drop across them than loads with less impedance. The effects of this can be devastating on equipment not designed to handle the changing of the supply voltage, not to mention, your lights would fluctuate between dim and the sun like a disco club. This is where the neutral wire comes into play.