Single core cables with Milliken conductors and solid bonding:
Where the conductors are subject to a reduced proximity effect, as with Milliken conductors, the eddy-current loss factor cannot be ignored, but shall be optained by multiplying the value of the eddy-current loss factor for single-core cables bonded at single point for the same cable configuration by the factor $F_e$.

Two- and three-core cables with steel tape armour:
The addition of steel tape armour increases the eddy-current loss in the sheath. The values for the eddy-current loss factor shall be multiplied by the factor $F_{et}$ if the cable has steel-tape armour.

Symbol
$F_{\mathrm{e}}$
Unit
-
Formulae
$\frac{4 M_{\mathrm{e}}^{2} N_{\mathrm{e}}^{2} + \left(M_{\mathrm{e}} + N_{\mathrm{e}}\right)^{2}}{\left(4 M_{\mathrm{e}}^{2} + 4\right) \left(N_{\mathrm{e}}^{2} + 1\right)}$$n_{\mathrm{c}} \leq 1$
$\left(1 + \frac{d_{\mathrm{s}}^{2}}{d_{\mathrm{a}}^{2} \left(\frac{d_{\mathrm{a}} \delta }{\mu_{\mathrm{s}}} + 1\right)}\right)^{2}$$n_{\mathrm{c}} > 1$
Related
$d_{\mathrm{a}}$
$d_{\mathrm{s}}$
$\mu_{\mathrm{s}}$
$n_{\mathrm{c}}$
Used in
$\lambda_{\mathrm{1e}}$