Transmission voltage typically ranges from:

Transmission voltage is classified based on its purpose and the distance it needs to cover. High-voltage transmission lines, which are crucial for efficiently transporting electricity over long distances, typically operate within the range of 138,000 volts to 765,000 volts. This range is essential for minimizing energy loss that occurs due to resistance in the conductors, allowing for power to be transmitted over hundreds of miles effectively.

When transmission voltages are maintained above 100,000 volts, they can improve the efficiency of the electrical system by reducing the current flow, which in turn helps to lower resistive losses. The specified range of 138,000 to 765,000 volts is considered standard for major transmission networks and interconnections between power generation facilities and substations.

Lower voltage ranges, such as 1,000 to 10,000 volts or 10,000 to 100,000 volts, are typically used for distribution rather than transmission, which generally cater to delivering power to consumers, whereas the higher voltages are for transmitting significant amounts of electricity across vast distances needed for large-scale power systems.