Which system is the most popular distribution voltage in use?

The most popular distribution voltage in use is 7,200/12,470Y V. This voltage level is widely utilized in the electrical distribution system, particularly in North America. The reason for its popularity includes the balance it strikes between manageable equipment size, efficiency, and safety for residential and light commercial applications.

This voltage allows for effective distribution over relatively long distances without excessive losses, making it suitable for urban and suburban settings where demand is significant. The 'Y' at the end indicates a wye configuration, which is desirable for providing phase-to-ground voltages that are lower and safer for residential use, thereby increasing reliability and allowing for easier grounding solutions.

Other voltage levels, while certainly in use, do not have the same level of prevalence in everyday distribution networks compared to 7,200/12,470Y V. Such factors contribute to its status as a go-to standard in utility distribution systems.