What typical voltage level is used for a standard residential electrical service?

In a typical residential electrical service, the standard voltage level used is 120 volts. This voltage is commonly utilized for most household appliances, lighting fixtures, and electrical outlets. In the United States, the electrical service is usually designed to provide both 120 volts and 240 volts to meet the needs of different devices.

For instance, while many smaller appliances and standard outlets operate on 120 volts, heavier equipment like dryers, ranges, and certain HVAC systems often require 240 volts. However, the foundational voltage level for residential service—primarily for general lighting and convenience outlets—is indeed 120 volts. This is defined by the National Electrical Code (NEC) and is critical for ensuring safe and effective electrical distribution within residential homes.

Other voltage levels mentioned, such as 240 volts, are commonly used for specific high-demand appliances but are not the voltage level for standard household circuits. Higher voltages like 480 and 600 volts are typically found in industrial or commercial applications rather than in residential settings.