At what voltages are distribution lines typically energized?

Distribution lines are typically energized at voltages such as 7200/12470 volts. This range is standard in many distribution systems for both urban and rural settings in North America. The 7200-volt level is especially common because it allows for efficient distribution of electricity while maintaining a manageable level for safety and system design. Additionally, 12470 volts serves as a direct line voltage for connecting to transformers that step down the voltage to standard consumer levels, such as 120/240 volts for residential use.

The other voltage options provided represent higher voltage levels generally associated with transmission systems rather than distribution. For instance, voltages like 7620/13200 and 14400/24500 are used in certain utility configurations but tend to be less common for standard distribution lines within residential areas. Options that involve 19900/34500 volts are typically considered transmission voltages, which are used for the long-distance transport of electricity rather than the distribution to end-users. This delineation emphasizes the importance of using lower voltage levels for local distribution to ensure safety and compatibility with typical consumer electrical systems.