Rating Factors for Depths of Laying for cables laid Direct In Ground or In Ducts:
| Depth Laying |
Cables Laid Direct in Ground |
Cables Laid in Ducts |
| Meter |
Upto 50 Sqmm² |
700 Sqmm² to
300 Sqmm² |
Above 300 Sqmm² |
Single core |
Multi core |
| 0.5 |
1.000 |
1.000 |
1.000 |
1.000 |
1.000 |
| 0.6 |
0.990 |
0.985 |
0.971 |
0.980 |
0.980 |
| 0.75 |
0.976 |
0.965 |
0.952 |
0.958 |
0.987 |
| 0.8 |
0.971 |
0.960 |
0.945 |
0.950 |
0.979 |
| 1.0 |
0.951 |
0.930 |
0.924 |
0.930 |
0.960 |
| 1.25 |
0.941 |
0.920 |
0.894 |
0.900 |
0.950 |
| 1.5 |
0.931 |
0.901 |
0.874 |
0.891 |
0.940 |
| 1.75 |
0.921 |
0.890 |
0.864 |
0.880 |
0.940 |
| 2.0 |
0.910 |
0.880 |
0.854 |
0.871 |
0.930 |
| 2.5 |
0.900 |
0.871 |
0.844 |
0.860 |
0.930 |
| 3.0 or more |
0.891 |
0.849 |
0.824 |
0.851 |
0.920 |