What can happen if the cable diameter is too small in electrical applications?

Selecting a cable diameter that is too small for electrical applications can significantly increase the resistance of the cable. When the resistance is higher, it leads to additional heat generation due to the current passing through the conductor, a phenomenon described by Joule's Law. This increased resistance can also limit the amount of current that can safely flow through the cable, which poses a risk of overheating and potentially damaging both the cable and connected components.

Additionally, if a cable overheats, it can lead to insulation failure, create fire hazards, and compromise the overall safety and reliability of the electrical system. Therefore, using appropriately sized cables is crucial for ensuring efficiency, safety, and longevity in electrical installations.

Improved flexibility and faster current flow are not outcomes associated with selecting a smaller diameter for a cable; in fact, these considerations would tend to lean toward using larger diameters.