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Temperature rise of the conductor by source h

Temperature rise of the conductor(s) of the rated cable, due to crossing heat source h, at the hottest point in the cable route.

Symbol
$\Delta \theta_{0x,h}$
Unit
K
Formulae
$\frac{\rho W_h}{4\pi} \ln\left(\frac{\left(L_r+L_h\right)^2+\left(z_r-z_h\right)^2}{\left(L_r-L_h\right)^2+\left(z_r-z_h\right)^2}\right)$
Related
$L_h$
Depth of laying of crossing element [mm]
$L_r$
Depth of laying of the rated object [mm]
$\pi$
Archimedes' constant $\pi$
$W_h$
Heat generated by external object [W/m]
$z_h$
Location of the heat source [m]
$z_r$
Location of the hottest point [m]