What gauge wire is safe for use when the ambient temperature is consistently above 20ºC?

The use of 14-gauge wire is appropriate in environments where ambient temperatures are consistently above 20ºC because it provides a balance between current-carrying capacity and flexibility for typical applications in aviation systems. Wire gauge is critical in determining how much current a wire can safely carry without overheating.

At higher temperatures, the resistance of the wire can increase, leading to possible overheating if the wire is undersized for the amount of current it needs to handle. The National Electrical Code (NEC) recommends that for maximum efficiency and safety, 14-gauge wire should be used for typical circuits that operate within designed currents, especially in the aviation industry where safety and reliability are essential.

Choosing a 14-gauge wire ensures sufficient capacity while maintaining safety margins, as this size can typically handle up to 15 amps adequately in situations where the environment is stable around the specified temperature. This makes it well-suited for many electrical components in aviation that would operate without elevated risks at a consistent ambient temperature.