In residential wiring, what is commonly the standard voltage used?

In residential wiring, the standard voltage typically used is 120 volts. This voltage level is designed for most household appliances, lighting fixtures, and general electrical outlets. The lower voltage is not only sufficient for the common devices found in homes, but it also enhances safety for domestic applications.

In many residential electrical systems, 120 volts is provided by a split-phase transformer that allows for both 120-volt and 240-volt circuits. While 240 volts is often utilized for larger appliances, such as dryers and ovens, it is primarily the 120-volt configuration that establishes the standard for general use throughout residential settings.

Other voltage levels such as 480 volts and 600 volts are typically found in industrial or commercial applications, where higher power levels are necessary for heavy machinery or equipment. Thus, for standard residential electrical systems, 120 volts remains the most widely used and recognized voltage.