Thermal resistance, 3rd loop

Symbol
$R_{c3}$
Unit
K.m/W
Formulae
$T_{j}$Single-core cables without armour
$T_{ab_{1}} + T_{ab_{2}}$Single-core cables with armour
$T_{2_{1}} + T_{ab_{2}} - \frac{T_{shj}}{3}$Three-core cables