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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