In residential installations, what is the nominal voltage for circuits supplying receptacles?

In residential installations within the United States, the nominal voltage for circuits supplying receptacles is typically 120 V. This voltage level is well-suited for most household appliances and electronic devices, making it a standard in homes for power outlets.

In contrast, while options like 230 V, 240 V, and 600 V may be applicable in other regions or for specific applications, they are not the standard for household receptacle circuits in residential settings. For example, 240 V is commonly used for high-power appliances like dryers or stoves but not for general receptacles. Similarly, voltages of 230 V and 600 V do not correspond to common household receptacle standards in many countries, further establishing that 120 V is the most appropriate answer in this context.