In order to calculate the cable ampacity for buried cables, the thermal resistivity needs to be determined. This is heavily dependent on the moisture content of the soil which varies.
IEEE 442 Annex F has information on determining the "critical moisture content":
"The critical moisture content is defined as the intersection of the tangents to the moist and dry line segments of the thermal resistivity versus moisture content curves."
What exactly do I do with this value? Ensure that it is lower than historical moisture values for the soil in question?
IEEE 442 Annex F has information on determining the "critical moisture content":
"The critical moisture content is defined as the intersection of the tangents to the moist and dry line segments of the thermal resistivity versus moisture content curves."
What exactly do I do with this value? Ensure that it is lower than historical moisture values for the soil in question?