What is meant by 'ampacity' in electrical terms?

Ampacity refers specifically to the amount of electric current a conductor or device can carry safely without exceeding its temperature rating. This is an important concept in electrical work because exceeding the ampacity of a conductor can lead to overheating, insulation damage, and potential fire hazards. Every type of conductor, such as wires and cables, has a specific ampacity, which is determined by several factors including its size, material, insulation type, and ambient temperature.

In practical terms, when selecting conductors for electrical installations, it is vital to consider their ampacity to ensure that they can handle the expected load without risks. This is why option A is the accurate definition of ampacity, as it encompasses the safety and integrity of the electrical system in relation to the current being carried.