What is the most commonly used voltage system in the country?

The most commonly used voltage system in the country for distribution in residential and commercial settings is indeed the 12.5 kV line. This voltage level is widely employed because it strikes a balance between efficiency and safety for distributing electricity over moderate distances. It is particularly effective in urban and suburban areas where the infrastructure is designed to handle this voltage while minimizing losses in power transmission.

The 12.5 kV system allows for the effective distribution of electricity to transformers which then step down the voltage to levels that can be safely used in homes and businesses. This system is well-suited for the needs of consumers and is part of a standardized approach that facilitates compatibility across various electrical infrastructures throughout the nation.

In contrast, higher voltage systems, like the 15 kV and 25 kV lines, are typically used for specific industrial applications or in transmission network segments where long-distance power transport is more crucial. The 480 V system is commonly used for localized commercial and industrial applications but does not serve as the primary system for wide-scale distribution.