What is the standard voltage for residential electrical systems in the US?

In residential electrical systems in the United States, the standard voltage for outlets is 120 volts. This voltage is used for most household devices, such as lamps, kitchen appliances, and electronics. Additionally, 240 volts are typically provided for larger appliances that require more power, such as dryers, ovens, and air conditioning systems. These systems are designed to accommodate the different power demands of various devices found in the home.

This dual voltage system allows for the efficient operation of both smaller and larger appliances, ensuring that homeowners can utilize a range of devices without the need for specialized wiring for everything. Understanding these voltage standards is crucial for safe and effective electrical installation and usage in residential environments.