From Open Electrical

Derating factors for installing cables in soil with thermal resistivity other than 2.5 K·m/W.

Soil ThermalResistivity (K·m/W)

Soil Thermal ResistivityDerating Factor

BuriedDirect

Buried inConduit

0.5 1.88 1.28

0.7 1.62 1.2

1 1.5 1.18

1.5 1.28 1.1

2 1.12 1.05

2.5 1 1

3 0.9 0.96

Back to Low Voltage Cable Data Reference

Retrieved from "http://www.openelectrical.org/wiki/index.php?title=Soil_Thermal_Resistivity_Derating_Factors"

This page was last modified on 15 March 2011, at 10:20.

Soil Thermal Resistivity Derating Factors - Open Electrical http://www.openelectrical.org/wiki/index.php?title=Soil_Thermal_Resi...

1 of 1 6/10/2011 3:20 PM