Distribution line voltages are classified into two main categories: primary distribution and secondary distribution.

• Primary Distribution: This is the medium voltage network that carries power from substations to local neighborhoods, industrial areas, and large commercial facilities. Voltages for primary distribution lines typically range from 2 kV to 35 kV.

• Secondary Distribution: This is the low-voltage network that carries power from local transformers directly to homes and businesses. Voltages for secondary distribution lines are much lower, commonly 120 V, 240 V, or 480 V, depending on the region and specific application.