XLPE insulation, thin steel-wire  armour,  PVC sheath power cable
(Cu/XLPE/PVC/SWA/PVC)
 

Standard: IEC 502-1983

For Medium voltage. Be applicable to the well, water inside and fall in the bad soil, can bear the larger positive pressure.
 

Service conditions and parameters:

 Max conductor operating temperature:  90°C
Short circuit temperature:>250°C no more than 2 seconds

Environment temperature of laying:
25°C  (in air)  15°C   (underground)
Depth of laying in direct:  100cm
Coefficient of thermal resistivity of soil:   100°C .cm/w
Coefficient of thermal resistivity of PVC:   700°C.cm/w