How is ampacity defined?

Ampacity is defined as the maximum current that a conductor can carry without overheating. This definition is crucial for ensuring the safe and efficient operation of electrical systems, as exceeding the ampacity of a wire can lead to excessive heat buildup, which may result in insulation failure, short circuits, fires, or other hazards. Understanding ampacity is essential for selecting appropriate conductors for specific applications, as it considers not only the material of the conductor but also factors such as ambient temperature, insulation type, and installation conditions.

The emphasis on "maximum current" highlights that this value establishes a limit for how much electric current can flow through a conductor under specified conditions, ensuring reliable and safe electrical conduction.