Effective transient thermal resistance in the earth for weekly load:

In the majourity of practical cases, the load variations will exhibit a more complex pattern than the one described by a daily load cycle, such as for example, loading of cables is usually much lighter during the weekend than during the weekdays.

For more information, refer to the transient thermal resistance $T_4et$..

Symbol
$T_{\mathrm{4w}}$
Unit
K.m/W
Formulae
$\frac{\rho_{\mathrm{4}}}{2 \pi} \ln{\left (\frac{D_{\mathrm{x_{\mathrm{w}}}}}{Do_{\mathrm{d}}} \right )}$
Related
$D_{\mathrm{x_{\mathrm{w}}}}$
$Do_{\mathrm{d}}$
$\rho_{\mathrm{4}}$
$T_{\mathrm{4et}}$
Used in
$T_{\mathrm{4\mu}}$