"Energy company Consolidated Edison and technology firm American Superconductor have signed an agreement to test a prototype power line as a step towards upgrading the power grid in New York. Under a project called Project Hydra, a power line could connect two substations in Manhattan using high-temperature superconducting cabling by 2010. The power lines developed by American Superconductor consist of several individual superconducting cables wrapped around a central tube filled with liquid nitrogen. This liquid nitrogen cools the cables until they experience zero electrical resistance, which allows them to carry up to 10 times more power than copper cabling of the same size." - bob from Bookmarklet

Just make sure you cut the power *before* the temp gets above -230C! - Gabe