What is a common voltage rating for residential receptacles?

The common voltage rating for residential receptacles is 120 volts. This standard voltage is widely used in residential wiring for general-purpose outlets and is specifically addressed in the National Electrical Code (NEC).

Residential devices and appliances such as lamps, televisions, and computers are typically designed to operate at this voltage, making it essential for general household usage. The choice of 120 volts is due to its balance between safety and efficiency in normal household applications.

Higher voltage ratings, such as 240 volts, are used for specific appliances like dryers and ovens, but these are not considered general-purpose receptacles. Ratings like 480 volts and 277 volts are typically found in commercial and industrial applications rather than residential settings. This makes 120 volts the standard for residential receptacles, as it meets the needs and safety requirements of typical household devices.