Final answer:
In the National Electrical Code (NEC), certain articles are subdivided into numbered parts for detailed organization.
Step-by-step explanation:
The question refers to the structure of the National Electrical Code (NEC), which is a widely adopted standard for the safe installation of electrical wiring and equipment in the United States. Within the NEC, certain articles are subdivided into numbered parts. This allows for a more organized and detailed breakdown of the codes and standards within each article of the NEC, facilitating easier reference and study. The NEC is structured into articles, and within these are sections, which may be further divided into parts for enhanced clarity and specification.