What do first-level subdivisions apply to in the NEC?

First-level subdivisions in the National Electrical Code (NEC) apply specifically to the scope of the section in which they exist. This means that each subdivision is related to the specific content and provisions of that section, providing clarity and organization to the material within that context. By focusing on the specific section, first-level subdivisions help to delineate the specific applications, limitations, or requirements that pertain directly to that section, ensuring that users can easily navigate and understand the relevant information without confusion.

Each subdivision addresses different aspects or criteria pertinent to the section, which makes it easier for practitioners to find and apply the necessary codes effectively. This structure enhances the usability of the NEC by maintaining a clear and logical framework throughout its chapters.