Factors that affect the maximum carrying capacity of the wire include: the cross-sectional area of the conductor, the maximum applicable temperature of the insulator, the ambient temperature, the heat dissipation mode of the wire, and so on. According to the single-core PVC insulated wire at 30℃ environment, to temperature up to the maximum use temperature of PVC material, the common 16AWG, 18AWG, 20AWG and 22AWG wire can pass the current of 24A, 18A, 13A and 10A, respectively.
Maximum current carrying capacity of a common power interface
Since the temperature inside the box may reach 40 ° C or even higher when the host is running, the heat on the joint that transmits a large current will be transferred to the neighboring joint. Depending on the number of Mini-Fit Jr. terminals and the level of the terminals, Molex has specified the rated current that can be transmitted by different numbers of terminals. The cable used is 18AWG and does not exceed the current carrying capacity of the wire itself.
With the standard version of Standars, when the number of terminals is 24 pins, each Pin can transmit 6A Current. With the same number of pins, the High Current System (HCS) can transmit 9A current per Pin. The enhanced high-current version of the terminal (Plus HCS,Plus High Current System) is 11A.