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.
Ground Fault Interrupter. Ground fault interrupters are designed to protect from electrical shock by interrupting a household circuit when there is a difference in the currents in the hot and neutral wires. Such a difference indicates that an abnormal diversion of current from the hot wire is occuring.