F. 2 IS -What is neutral wire, earth wire and live wire?

Earth wire (地線)
The wire connecting the metal case of an appliance to the earth for safety.

Neutral wire (中線)
The wire connected to the hole at the bottom left corner of a socket.

Live wire (活線／火線)
The wire connected to the hole at the bottom right corner of a socket.

Live wire is the most dangerous wire. That is the wire that electicity pass through. Neutral wire is for completion of the circuit. You wont get a electricty shock even if u stick ur figure in that hole. (but of cos dun try.. !!!! haha.. ) Earth wire is for protection purpose.