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Thermal resistance, 2nd loop

This considers the screen bedding and serving plus the insulation screen. For three-core cables, this also includes the jacket over each sheath.

Symbol
$R_{c2}$
Unit
K.m/W
Formulae
$T_{is}+T_{scb}+T_{scs}$Single-core cables
$\frac{T_{is}}{3}+\frac{T_{scb}}{3}+\frac{T_{scs}}{3}+\frac{T_{shj}}{3}$Three-core cables
Related
$T_{is}$
Thermal resistance of insulation screen [K.m/W]
$T_{scb}$
Thermal resistance of screen bedding [K.m/W]
$T_{scs}$
Thermal resistance of screen serving [K.m/W]
$T_{shj}$
Thermal resistance of sheath jacket [K.m/W]