What type of power supply is most commonly used in residential areas?

The 120/240V split-phase system is the most commonly used power supply in residential areas primarily because it provides a reliable and efficient way to supply electricity for various household needs. This system delivers both 120 volts and 240 volts by utilizing two 120V phases that are out of phase with each other. This dual voltage capability allows for powering standard household appliances, which typically operate at 120V, while also supporting larger appliances, such as dryers and electric ovens, that require 240V.

In contrast to other types of systems, the split-phase system effectively balances the load across the two phases, which enhances the overall efficiency of the electrical system. The split-phase design also makes it easier to manage electrical loads, ensuring that circuits can safely handle the varying demands of different devices without overloading.

Overall, the 120/240V split-phase system is tailored to meet the diverse power requirements of residential living, making it the most practical choice for home power supply.