What is the standard voltage level for residential electrical systems in North America?

The standard voltage level for residential electrical systems in North America is 120/240 volts. This configuration is common in homes to provide both 120 volts for most appliances and lighting, as well as 240 volts for larger appliances like dryers and ovens. The split-phase system delivers 120 volts from each leg to neutral, which is essential for powering individual circuits. Additionally, the 240 volts is achieved by utilizing both legs of the supply, allowing for a higher voltage supply necessary for heavier electrical loads.

This standard ensures compatibility with the majority of devices and appliances found in North American homes, facilitating a safer and more efficient electrical distribution system. Other voltage levels listed, such as 100/220 volts, 110/230 volts, and 120/230 volts, are not standard for residential use in North America and may reflect different systems or regions outside this specific context.