What is the standard voltage for residential electrical systems in the United States?

The standard voltage for residential electrical systems in the United States is predominantly 120 volts for general outlets and 240 volts for larger appliances. This setup is designed to offer a safe and efficient distribution of electricity throughout homes.

Most household outlets supply 120 volts, which is sufficient for lighting and small appliances such as TVs, computers, and kitchen gadgets. Larger appliances, like dryers, ovens, and HVAC systems, typically require a higher voltage of 240 volts to operate effectively, as these devices demand more power. The use of different voltages allows for efficient energy consumption while meeting the diverse needs of various household electrical devices.

The 120-volt outlets are the standard for general use because they are designed for safety and compatibility with everyday devices. The 240-volt supply, on the other hand, supports the additional power needs of larger appliances without compromising the overall safety and efficiency of residential electrical systems. This separation ensures that residential wiring is both practical for everyday use and capable of handling high-demand appliances when necessary.