How is the term ampacity defined?

Ampacity is defined as the maximum current a conductor can carry continuously without exceeding its temperature rating. This definition is essential for ensuring safety and preventing overheating, which can lead to insulation damage or potential fire hazards. The higher the current passing through a conductor, the greater the heat generated due to resistance. Therefore, ampacity is critical for electrical systems to ensure that conductors are used within their limits for both efficiency and safety.

Understanding ampacity allows engineers and electricians to select the appropriate wire sizes and materials for specific applications, taking into account factors such as ambient temperature and installation conditions. This ensures that the electrical system functions correctly without risking failure due to excess heat.