According to electrical codes, branch circuits in dwelling units are restricted to supply loads from which of the following?

Branch circuits in dwelling units are designed specifically to supply power to the loads within that particular dwelling unit to ensure safety, reliability, and compliance with electrical codes. This restriction is important as it helps in managing the electrical load and prevents issues such as overloads, which can lead to potential hazards like fires. Each dwelling unit typically has its own set of circuits to cater to its unique power needs, ensuring that there is no interference or overload from external sources.

The codes are structured to maintain a clear boundary for electrical systems within residential buildings, focusing on the safety and performance of those systems. This allows for individual control of electrical loads and contributes to the overall efficiency of the dwelling's electrical system. By limiting branch circuits to only supply loads from the dwelling unit itself, the codes also aid in simplifying troubleshooting and maintenance, as issues can be resolved without affecting other units or external systems.