Distribution wires/system is the last leg of the delivery of electrical power from generation to the consumer. Distribution lines will originate from a substation fed from a transmission line and are commonly seen along city streets and country roads. The voltage on distribution systems can range from 4kV to 25kV (4,000 – 25,000 volts).
Electric transmission lines are the part of the electric delivery system that moves bulk electricity from generation sites over long distances to substations closer to the area of demand for the electricity. These lines are larger and on taller poles or metal structures/towers. Transmission lines generally have voltages over 100 kV (100,000 volts).