As $γ$ depends upon the current in the rated cable, which is to be determined, an iterative solution is necessary, using as a first estimation of this current the rated current when the heat source is assumed to be parallel to the rated cable $Δθ_0$.

Symbol
$\gamma_{\mathrm{X}}$
Unit
1/m
Formulae
$\sqrt{\frac{T_{\mathrm{L}}}{T_{\mathrm{r}}} \left(- \Delta W T_{\mathrm{eq}} + 1\right)}$
Related
$\Delta W$
$T_{\mathrm{eq}}$
$T_{\mathrm{L}}$
$T_{\mathrm{r}}$
Used in
$T_{\mathrm{mh_{\mathrm{v}}}}$