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What is the minimum required service in amps for a single residential dwelling unit?

  1. 60 amps

  2. 100 amps

  3. 150 amps

  4. 200 amps

The correct answer is: 100 amps

The minimum required service for a single residential dwelling unit is 100 amps. This standard has been established to ensure that homes have sufficient electrical capacity to accommodate the needs of modern living, including lighting, heating, appliances, and electronic devices. A service of 100 amps generally supports typical household electrical demands while providing some margin for additional future usage. As homes have evolved with greater electrical needs—due to advancements in technology and an increasing number of electrical devices—100 amps serves as a baseline that is adequate for many average-sized homes. Higher capacities, such as 150 amps or 200 amps, are often recommended for larger homes or those with specialized electrical requirements, but the minimum baseline established by building codes for a standard residential dwelling is indeed 100 amps. This standard is crucial for ensuring safety and functionality in electrical installations.