The functions of low and high voltage wires differ within the electrical systems. The low voltage wire is utilized in residential applications such as lighting, alarm systems, and low power devices which generally operate below 50 volts. They are also much easier to install and safer to use in general. High voltage wires, above 1,000 volts, are necessary for the transmission of electricity over vast distances in power grids and for industrial purposes. One of the most important factors in electrical work is understanding the differences in insulation, conductor materials, and application suitability for safety and efficiency.