What is the typical voltage supply in a standard household in the U.S.?

• A. 120 Volts
• B. 240 Volts
• C. 480 Volts
• D. 60 Volts

Answer: (A)

In a standard household in the U.S., the typical voltage supply is 120 volts. This voltage level is designed to safely power common household appliances and devices such as lights, televisions, and kitchen appliances. The 120-volt supply is part of the standard electrical system established for residential buildings, allowing for efficient operation of equipment that does not require high power.

While 240 volts is also utilized in houses, it is primarily for larger appliances, like dryers and ovens, rather than for general consumption throughout the home. Therefore, the main circuits that serve common outlets and light fixtures operate at the 120-volt level. Other voltages, such as 480 volts or 60 volts, are not typical for residential use; 480 volts is often used in industrial settings, while 60 volts is insufficient for most household appliances. Understanding the standard 120-volt supply helps emphasize safety and functionality in residential electrical systems.