When calculating demand loads for a dwelling unit, which types of loads must be considered?

When calculating demand loads for a dwelling unit, it is essential to consider multiple load types to ensure that the electrical system can handle the expected energy consumption safely and efficiently. The correct answer includes lighting, receptacle, small appliance, and laundry loads, as each of these contributes to the overall demand an electrical system must support.

Lighting loads account for the energy used by all light fixtures in the home, which can vary based on the fixtures and usage patterns. Receptacle loads represent the energy used by devices plugged into electrical sockets, which can also vary significantly from household to household. Small appliance loads include devices typically used in kitchens, such as microwaves and coffee makers, which are common in daily activities. Lastly, laundry loads encompass the energy consumed by washing machines and dryers, which are also essential for household functions.

Combining these load types gives a comprehensive view of the dwelling's electrical demands, ensuring that proper safety measures, such as circuit sizing and breaker installation, can be met. Ignoring any of these components could lead to inadequate electrical supply and potential hazards.