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Factor $F_e$ eddy-current losses

Single core cables with Milliken conductors and both-side 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 obtained 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 $F_e$ if the cable has steel-tape armour.

Symbol
$F_{e}$
Formulas
$\frac{4{M_{e}}^2 {N_{e}}^2+\left(M_{e}+N_{e}\right)^2}{4\left({M_{e}}^2+1\right) \left({N_{e}}^2+1\right)}$
Related
$M_{e}$
Substitution coefficient $M_e$ to calculate factor $F_e$
$n_{c}$
Number of conductors cable
$N_{e}$
Substitution coefficient $N_e$ to calculate factor $F_e$
Used in
$\lambda_{1}$
Loss factor shield (screen/sheath)
$\lambda_{12}$
Loss factor shield, eddy currents