The radial configuration is commonly used to supply power to low and high-density areas.
The radial configuration is the simplest and cheapest system to transfer the energy from generation end to customer end. The radial system also has the high protection system which reduces the danger or failure of the power loss to the customer end. The fluctuation in the voltage of system is very low due to which it also improves the voltage regulation, reliability of the system and improve the efficiency of the system.
Since the radial system has high reserve Capacity, better voltage regulation, reliability and low less costly, most distribution feeders in the United States built in a radial configuration.