Which type of circuits in a dwelling unit are allowed to supply loads exclusively from that unit?

In residential electrical systems, branch circuits are specifically designed to carry electrical loads within a dwelling unit. These circuits are used to supply power to individual appliances, lighting fixtures, and other devices within the home. By definition, a branch circuit originates from a distribution panel and extends to various outlets and devices within that unit, ensuring that each circuit is reliably protected and capable of handling the specific load requirements.

Branch circuits are distinct from the other options listed. Tap circuits generally refer to additional circuits extending from a main circuit but are not solely dedicated to a single dwelling. Main circuits provide overall distribution of electrical power from the utility connections to the interior of the dwelling but serve the entire electrical distribution system. Feeder circuits are designed to carry power between the main service equipment and a subpanel or between different points within the electrical system, rather than supplying loads within the unit exclusively. Thus, the characteristics and purpose of branch circuits make them the appropriate answer, as they cater specifically to the electrical needs of a single dwelling unit.