Which of the following is a requirement listed under NEC Chapter 9, Table 4?

The requirement listed under NEC Chapter 9, Table 4 relates to conduit fill calculations. This table provides the maximum allowable fill for various types of raceways and cables, ensuring that electrical conductors can be installed without overheating or losing efficiency due to overcrowding. Proper conduit fill calculations are crucial for maintaining safety and compliance with electrical codes, as excessive fill can prevent heat dissipation and increase the risk of fire hazards.

In contrast, grounding conductor sizing, wiring method specifications, and insulation color coding are covered in different sections of the National Electrical Code (NEC) and do not pertain specifically to the content or requirements outlined in Chapter 9, Table 4. Grounding specifications are typically addressed in NEC Article 250, while wiring methods and color codes are discussed in Articles that govern specific installation practices and safety standards. Thus, understanding the context and application of NEC Chapter 9, Table 4 is essential for electrical installations and safety compliance.