A typical regulator bank

Regulator Bank

You will also find regulator banks located along the line, either underground or in the air. They regulate the voltage on the line to prevent undervoltage and overvoltage conditions.

Up toward the top are three switches that allow this regulator bank to be disconnected for maintenance when necessary:

At this point, we have typical line voltage at something like 7,200 volts running through the neighborhood on three wires (with a fourth ground wire lower on the pole):