Electrical plugs and socket-outlets differ in voltage and current rating, shape, size and type of connectors. The types used in each country are set by national standards.When we use sockets to connect higher rating equipment we must use 16A sockets called high power Socket they are used for connecting geysers, AC, Room heaters , Kitchen appliances and water pumps. Use them with suitable rating switches , motor starters or mini MCB.

Generally the plug is the movable connector attached to an electrically operated device's power cord, and the socket-outlet is fixed on equipment or a building structure. The plug has protruding prongs, or pins that fit into matching slots or holes in the socket-outlet. A socket is also called a receptacle, outlet, or power point.