XLPE Section

Use the ratings tables.

You know the application, work from there.

http://www.scribd.com/doc/27097013/XLPE-Insulated-Low-Voltage-Cables Check page 19 for amp rating

Nominal
Area of
Conductor
Unarmoured Armoured Multi core
mm2 PVC XLPE PVC XLPE PVC XLPE
25 23.9 22.5 25.8 24.4 76 90
35 26.2 24.9 28.1 27.0 92 108
50 29.5 27.4 31.4 29.1 100 126
70 33.5 31.8 35.2 33.5 135 158
95 37.2 34.9 38.9 36.7 165 187
120 41.2 38.7 42.7 40.6 185 215
150 43.8 41.6 46.1 43.9 210 240
185 47.7 43.8 49.6 47.1 235 273
240 56.6 53.2 58.3 55.2 275 316
300 62.5 59.2 64.2 61.0 305 355
400 69.8 66.8 71.6 68.3 335 420
500 77.2 73.4 79.4 74.8 350 505

There are 3 sets of figures for each cable size what correlates to what?

I hope your 5 senses are in good condition.Try using your sense here also humor sense.