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.
Faults. 1  Faults: a fault is a break in the lithosphere along which movement has occurred. 2  The part of the fault above the fault plane is called the hanging wall and the part below is called the footwall. 3  A normal fault occurs when a hanging wall moves down with respect to the footwall.