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