In multi-core cables, the axial separation depends on the sreen and sheath construction.
In arrangements with single-core cables, the axial separation is the shortest distance between the center of two phases.
$\frac{D_{is}}{F_x}$ | Multi-core cables, sector-shaped conductors |
$D_i$ | Multi-core cables, common screen/sheath |
$D_i+2\left(t_{scb}+t_{sc}+t_{scs}\right)$ | Multi-core cables, separate screen and common sheath |
$D_{sh}$ | Multi-core cables, separate screen/sheaths |
$D_{shj}$ | Multi-core cables, jacket around each core |