Vector Limited operates as an energy infrastructure company in New Zealand. It owns and operates electricity distribution networks in Auckland City, Manukau City, and parts of the Papakura District under the ?Vector Electricity? brand name; and in the North Shore City, Waitakere City, and Rodney District under the ?UnitedNetworks? brand name. The company also operates a high pressure gas transportation system supplying major centers of the North Island, as well as lower pressure gas distribution networks in approximately 30 towns and cities; sells natural gas to gas retailers, electricity generators, petrochemical plants, and commercial and industrial customers; engages in wholesale and tolling of liquefied petroleum gas; and owns and operates gas processing facilities, as well as produces and sells propane and butane, natural gasoline, and carbon dioxide. In addition, Vector also provides electricity and gas metering services, as well as energy data management services; owns, operates, and wholesales open access fibre-optic broadband communications networks in Auckland and Wellington; and owns and operates wind turbines for electricity generation. Further, the company offers training for people working in the utilities sector; and provides professional arboriculture and vegetation management services. As of June 30, 2009, it provided electricity to approximately 523,394 consumers in Auckland and Wellington; natural gas to 149,516 customers in the North Island; liquefied petroleum gas to 23,000 customers in New Zealand; electricity and gas metering services to 810,000 homes and businesses in New Zealand; and metering data services to 15,000 customers in New Zealand and Australia. The company was formerly known as Mercury Energy Limited and changed its name to Vector Limited in 1999. The company was founded in 1994 and is based in Auckland, New Zealand. Vector Limited is a subsidiary of Auckland Energy Consumer Trust.