Diameter over screen bedding

This is the diameter below screen, sometimes called $D_1$.

Symbol
$D_{scb}$
Unit
mm
Formulae
$F_{x} \left(d_{c} + t_{2i}\right) + 2 t_{f} + 2 t_{scb}$Multi-core cables with common screen
$d_{c} + t_{2i} + 2 t_{scb}$otherwise
Related
$d_{c}$
External diameter of conductor [mm]
$F_{x}$
Geometrical distance factor for multi-core cables
$t_{2i}$
Thickness of insulation between conductors [mm]
$t_{f}$
Thickness of filler/belt insulation [mm]
$t_{scb}$
Thickness of screen bedding [mm]
Used in
$A_{sc}$
Cross-sectional area of screen [mm$^2$]
$A_{scb}$
Cross-sectional area of screen beddig [mm$^2$]
$D_{f}$
External diameter of the filler [mm]
$D_{sc}$
Diameter over screen [mm]
$d_{sc}$
Mean diameter of screen [mm]
$T_{scb}$
Thermal resistance of screen bedding [K.m/W]