Empresa Nacional de Electricidad SA was incorporated on December 1, 1943. The Company is an electricity utility company engaged, directly and through its subsidiaries and affiliates, in the generation and transmission of electricity businesses in Chile, Argentina, Brazil, Colombia and Peru. As of December 31, 2013, it had 13,688 MW of installed capacity, with 178 generation units in the four countries in which it operates. The Chilean electricity industry is divided into three business segments: generation, transmission and distribution. The generation segment comprises a group of electricity companies that own generating plants, whose energy is transmitted and distributed to end customers. The transmission system comprises a combination of lines, substations and equipment for the transmission of electricity from the production points (generators) to the centers of consumption or distribution. The distribution segment is defined for regulatory purposes as all electricity supplies to end customers at a voltage no higher than 23 kV. Its competitors in the SING are E-CL (GDF Suez group) and Gener, which have 2,147 MW and 1,465 MW of installed capacity, respectively. Its competitors in Colombia include the following state-owned companies: Empresas Públicas de Medellín (with an installed capacity of 3,251 MW) and Isagen (with an installed capacity of 2,182 MW). The competitors in Peru are Enersur (GDF-Suez group, with an installed capacity of 1,264 MW); Electroperú (a state-owned competitor, with an installed capacity of 902 MW); Kallpa (Inkia Energy group, with an installed capacity of 861 MW); and Egenor (Duke Energy group, with an installed capacity of 622 MW). Electricity facilities are subject to federal and local environmental laws and regulations, including Law 24,051, the "Hazardous Waste Law," and its ancillary regulations.