1 : Surface area is a country's total area, including areas under inland bodies of water and some coastal waterways. 2  Irrigated land: The number of square kilometers of land area that is artificially supplied with water. 3  Population density: People per square kilometre, in 1999. 4  At this time the world average was 14.42.
A ground fault is an inadvertent contact between an energized conductor and ground or equipment frame. The return path of the fault current is through the grounding system and any personnel or equipment that becomes part of that system.
The ground wire is an alternative path to ground that is all. If there is a switch between the outlet and the box the path to ground may be severed(IE: Turned off) unless you have a ground wire and dont do something silly like using that adapter or breaking off the third prong.