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 current path[250.2]. An electrically conductive path from a ground fault to the electrical supply source. Authorâs comment: The fault-current path of a ground fault is not to the earth! Itâs to the electrical supply source, typically the XO terminal of a transformer. The difference between an âeffective ground-fault current pathâ and âfault-current pathâ is that the effective ground-fault current path is âintentionallyâ constructed to provide the low-impedance fault-current path to the electrical supply source for the purpose of clearing the ground fault.