In the National Electrical Code, the current carrying abilities of conductors are referred to as:

The term used in the National Electrical Code to describe the current-carrying abilities of conductors is "ampacities." Ampacity refers to the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. This value is influenced by several factors, including the type of conductor material, its temperature rating, the installation environment, and whether it is bundled with other conductors.

Understanding ampacity is crucial for electrical installations to ensure safety and efficiency, as exceeding the ampacity can lead to overheating, potential fire hazards, and failure of electrical components. Properly interpreting and applying ampacity helps in selecting appropriate conductors for specific applications, fulfilling code requirements, and preventing electrical hazards.