According to NEC provisions, what does Note 5 of Table 310.4(A) refer to?

Note 5 of Table 310.4(A) in the National Electrical Code (NEC) specifically addresses ampacity limitations for conductors under certain conditions. Ampacity refers to the maximum amount of electrical current a conductor or device can carry before sustaining immediate or progressive deterioration. This note is crucial for ensuring that conductors are not overloaded, which could lead to overheating and potential fire hazards.

Understanding the ampacity limitations is essential for electrical installations to ensure safety and compliance with the NEC. This helps in selecting the appropriate conductor sizes for different applications and environmental conditions, ensuring both efficient and safe operations of electrical systems.