In a 28-volt system with AN20 wire and 14 feet of wire, what are the maximum amps?

In a 28-volt system, the maximum current carrying capacity for AN20 wire over a distance of 14 feet is indeed determined by aviation standards regarding temperature, wire insulation, and other factors.

AN20 wire is rated for a specific ampacity which is the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. For a 28-volt aircraft electrical system, AN20 wire has a maximum ampacity of approximately 7 amps when considering the length of the wire and the necessary safety factors to prevent excessive heat generation and possible damage.

When the length of the wire is taken into account, longer runs tend to have increased resistance, which can also affect the wire's ability to handle current without overheating. In this instance, 14 feet is a relatively short distance, and 7 amps reflects the safe operating limit for this wire gauge in these electrical systems under typical conditions.

This knowledge ensures the proper sizing and selection of wire used in aircraft applications to maintain safety and reliability.