Cableizer
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Total thermal resistance

Total thermal resistance per conductor.

Symbol
$T_r$
Unit
K.m/W
Formulae
$T_1+n_c \left(T_2+T_3\right)+n_{cc} \left(T_{4i}+T_{4ii}+v_4 T_{4\mu}\right)$cable
$T_{hs}+T_{4iii}$heat source
Related
$n_c$
Number of conductors in object
$n_{cc}$
Number of conductors combined
$T_1$
Thermal resistance between one conductor and sheath [K.m/W]
$T_2$
Thermal resistance of armour bedding [K.m/W]
$T_3$
Thermal resistance of jacket [K.m/W]
$T_{4i}$
Thermal resistance of medium in the duct [K.m/W]
$T_{4ii}$
Thermal resistance of the duct wall [K.m/W]
$T_{4iii}$
Thermal resistance to ambient [K.m/W]
$T_{4\mu}$
Thermal resistance to ambient [K.m/W]
$T_{hs}$
Thermal resistance of heat source [K.m/W]
$v_4$
Ratio thermal resistivity dry/moist soil
Used in
$\gamma_X$
Attenuation factor for crossing [1/m]