External diameter of object

Symbol
$D_e$
Unit
mm
Formulae
$\frac{n_c D_{shj}+\left(D_{shj}+2t_{ab}+2t_{ar}+2\left(t_j+t_{jj}\right)\right) \pi}{\pi}$Multi-core cables, without filler (duplex/triplex)
$D_j$otherwise