Utility companies generate power on a massive scale at power plants. The problem becomes taking power and delivering it to the ultimate consumer, whether commercial or residential. Because the power that leave the plant must of necessity be extremely high voltage, different types of power transmission lines are used in the process, with each line designed for the most efficient means of transporting electricity.
High-Voltage Transmission Lines
Electric utilities build power plants, as a general rule, in areas with few people and open spaces. As a result, the power generated must often travel long distances, thus the need for high-voltage transmission lines. These lines convey high voltage efficiently and quickly, but the electricity on these lines is not usable commercially or residentially due to its high voltage.
Subtransmission Distribution Lines
When the power reaches a local neighborhood or business district, another transformer awaits on the top of a pole. Another "step-down" occurs and electricity is sent out over local lines, either above or below ground, in transmission lines to homes and businesses.
Local Distribution Lines
When the power reaches a local neighborhood or business district, another transformer awaits on the top of a pole. Another "step-down" occurs and electricity is sent out over local lines, either above or below ground, in transmission lines to homes and businesses.