What does "ampacity" refer to?

Ampacity is defined as the maximum amount of electric current a wire or cable can safely carry before it reaches a temperature that could cause damage to the conductor or insulation. This concept is crucial for ensuring the safe and efficient operation of electrical systems, as exceeding the ampacity of a cable can lead to overheating, insulation breakdown, and potential fire hazards.

When selecting wires for electrical installations, understanding ampacity helps electricians choose the appropriate wire size based on the expected load and conditions such as ambient temperature and installation method. Proper adherence to ampacity ratings is essential for maintaining system reliability and safety.