Which section pertains to conductors that can be exposed to direct sunlight?

The correct section that pertains to conductors that can be exposed to direct sunlight is indeed 310.10(D). This section specifically provides guidelines on the temperature limitations of conductors and how certain conditions, like exposure to sunlight, can impact their performance and safety.

When conductors are exposed to direct sunlight, they can experience increased temperatures which can exceed their rated limitations. Section 310.10(D) addresses this concern by providing adjustments to the ampacity of conductors based on the temperature rise that can occur from solar radiation, thus ensuring the safety and effectiveness of electrical installations in such conditions. This helps prevent overheating and reduces the risk of electrical fires or failures due to improper handling of conductor temperature ratings.

Understanding the nuances of solar exposure is crucial for anyone working with electrical systems, ensuring that installations maintain their integrity and comply with safety standards.