Low Voltage Cables/Current Ratings And Voltage Drop List/Rating Factors for variation in Ground temperature for Cables Laid Direct In Ground or In Ducts


 

Rating Factors for variation in Ground temperature for Cables Laid Direct In Ground or In Ducts


Ground Temperature °C  15  20 25
30
 35  40 45
50
XLPE insulated cable 90oC  1.04  1.0  0.96  0.93  0.89  0.85  0.80  0.76
PVC insulated cable 85oC  1.04  1.0  0.96  0.92  0.88  0.83  0.78  0.73
PVC insulated cable 70oC  1.05  1.0  0.95  0.89  0.84  0.77  0.71  0.63