Mutual heating substitution coefficient for a group of equally loaded buried cables:

There are (q-1) terms considered in the product, with the term $d_{pp1}/d_{pp2}$ excluded. q is the number of non-touching cables within the same cable system.

Symbol
$F_{\mathrm{eq}}$
Unit
-
Formulae
$\displaystyle \prod_{k=1}^{q} \frac{d_{\mathrm{pk1}}}{d_{\mathrm{pk2}}}$
Related
$d_{\mathrm{pk1}}$
$d_{\mathrm{pk2}}$
Used in
$d_{\mathrm{f}}$
$\Delta T_{\mathrm{4}}$
$\gamma_{\mathrm{t}}$
$T_{\mathrm{4iii}}$