What is a common consequence of exceeding the ampacity of a wire?

Exceeding the ampacity of a wire means that the current flowing through the wire is greater than the wire is rated to handle. This situation can lead to various negative consequences, the most significant of which are potential wire damage and fire hazards. When a wire carries more current than it can handle, it generates excessive heat due to the resistance of the wire material. This heat buildup can cause the insulation surrounding the wire to deteriorate, which increases the risk of short circuits and electrical fires.

Additionally, prolonged exposure to excessive current can cause the wire itself to become damaged, potentially leading to failure of the electrical system. In residential or commercial settings, this could not only damage equipment but also pose severe safety risks to occupants. Therefore, understanding and adhering to the ampacity ratings is crucial for ensuring safe and reliable electrical installations.