In residential wiring, what is the common voltage for standard outlets?

In residential wiring, the standard voltage for outlets in most homes is 120 volts. This voltage is commonly used for general lighting, receptacles, and many household appliances. The electrical systems in residential buildings are designed to accommodate this voltage as it is safe for typical home use, offering a balance of efficiency and safety for powering everyday devices like lamps, televisions, and computers.

While 240 volts is used for larger appliances such as dryers or ovens, and voltages like 277 volts or 480 volts are used primarily in commercial or industrial settings, they are not standard for residential outlets. The designation of 120 volts aligns with the North American electrical standards, making it the appropriate choice in this context.