Main technical parameters
Calculation conditions of cable carrying capacity
Ambient temperature: it is laid at 40 C in air and buried at 25 C.
Working temperature of cable conductor at 70 degrees centigrade
When the cable is buried, the coefficient of soil thermal resistance is g=1.0. M/W. But the phenomenon of the increase of soil thermal resistance coefficient is not taken into account in the long term operation of the cable due to the migration of water.
When the cable is buried, the distance between the cable axis and the ground is 700mm.
Many cables are laid flat, and the axis of the cable is S=2D.