: A specific factor is then calculated to account for heat dissipation into adjacent materials, such as cable insulation or surrounding soil.
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By accounting for non-adiabatic heating (heat dissipating into insulation or surrounding mediums), it provides a more realistic and often higher allowable current limit than strictly conservative adiabatic calculations. : A specific factor is then calculated to
Unlike the simpler adiabatic method, the full IEC 949 approach accounts for into surrounding materials like insulation or the cable sheath. IEC 60949:1988 IEC 60949:1988 The primary innovation of IEC 60949
The primary innovation of IEC 60949 is its shift from a purely adiabatic assumption to a more realistic non-adiabatic calculation: Adiabatic Assumption: