Table 400.4 in the NEC is used to determine which characteristic of flexible cords?

Table 400.4 in the NEC is used to determine which characteristic of flexible cords?

• A. Types of fixture wire
• B. Types of flexible cord
• C. Corrected ampacity for flexible cord conductors
• D. All of these

Answer: (C)

Table 400.4 is about how much current a flexible cord or cable can safely carry under real-world conditions. It provides the ampacities for different conductor sizes and insulation temperature ratings, and is used to determine the adjusted (corrected) ampacity for a given installation. In other words, you look up the cord’s size and its insulation rating to find its current-carrying capacity, and then apply any necessary adjustments if the installation environment (like temperature or grouping of conductors) would reduce that capacity. This is why it’s described as determining the corrected ampacity for flexible cord conductors. It isn’t about listing types of fixture wire or categorizing flexible cords by type alone.

Table 400.4 is about how much current a flexible cord or cable can safely carry under real-world conditions. It provides the ampacities for different conductor sizes and insulation temperature ratings, and is used to determine the adjusted (corrected) ampacity for a given installation. In other words, you look up the cord’s size and its insulation rating to find its current-carrying capacity, and then apply any necessary adjustments if the installation environment (like temperature or grouping of conductors) would reduce that capacity. This is why it’s described as determining the corrected ampacity for flexible cord conductors. It isn’t about listing types of fixture wire or categorizing flexible cords by type alone.