What does NEC 110.14(C) require regarding conductor ampacity?

The requirement stated in NEC 110.14(C) emphasizes the importance of ensuring that the ampacity of conductors is coordinated with the termination ratings of the equipment to which they are connected. This is crucial because the maximum current that a conductor can safely carry (its ampacity) must align with what the terminals of the equipment can handle without risk of overheating or failure.

When conductors are connected to equipment, the conductor's temperature rating directly influences its capacity to safely carry electrical current, particularly if the equipment is rated for different terminations. If there is a mismatch, it could lead to failure in the equipment, potential overheating, and safety hazards such as electrical fires. Therefore, this requirement focuses on the need for appropriate matching to ensure safe and reliable electrical installations.

The other options touch on important aspects of electrical safety and installation practices, but they do not capture the specific coordination needed between conductor ampacity and equipment termination ratings that NEC 110.14(C) addresses.