To ensure the continuous operation of conductors over a long period, the allowable current density is referred to as the safe current carrying capacity.
Standard specifications typically range from 5 to 8A/mm2 for copper wire and 3 to 5A/mm2 for aluminum wire. The safe current carrying capacity should be determined based on a comprehensive assessment of factors such as the conductor's maximum operating temperature, cooling conditions, and installation conditions in the application environment. Aviation Power
In general, wires with shorter lengths, smaller cross-sectional areas, better heat dissipation, and lower temperatures tend to have higher conductivity and can handle higher safe current carrying capacities.
Long distance, large cross-sectional area, poor heat dissipation, high temperatures, and poor natural environment result in weaker conductive capacity of the wire, with the safe current carrying capacity being selected at the lower limit; 400HZ power supply
Conductivity-wise, bare conductors are stronger than insulated wires, overhead wires are stronger than cables, cables buried underground are stronger than those laid on the ground, and so on.
