What is the standard voltage used in the United States?

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Study for the GFA Lighting and Electric Test. Enhance your skills with flashcards and multiple choice questions. Each question includes hints and explanations to get you ready for your exam!

Multiple Choice

What is the standard voltage used in the United States?

Explanation:
In the United States, the standard power for most homes is 120 volts AC. The system is split-phase, giving 120 V from each hot leg to neutral and 240 V between the two hot legs. This 60 Hz supply powers most outlets and lighting. Some larger appliances use higher voltages, like 240 V, and in certain commercial settings you’ll see voltages such as 208 V or 277 V. Older equipment sometimes ran on 110 V or 115 V, but today the typical general-use voltage is 120 V.

In the United States, the standard power for most homes is 120 volts AC. The system is split-phase, giving 120 V from each hot leg to neutral and 240 V between the two hot legs. This 60 Hz supply powers most outlets and lighting. Some larger appliances use higher voltages, like 240 V, and in certain commercial settings you’ll see voltages such as 208 V or 277 V. Older equipment sometimes ran on 110 V or 115 V, but today the typical general-use voltage is 120 V.

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