# Radius below the outer semi-conducting layer

Radius of the insulation without the insulation screen (outer semi-conducting layer). In case of nulti-core cables with common screen, this is the radius from the center of the cable to the common screen.

Symbol
$r_{osc}$
Unit
mm
Formulae
 $\frac{D_i}{2}$ multi-core cables with common screen $r_{isc}+t_{ins}$ otherwise
Related
$D_i$
$r_{isc}$
$t_{ins}$
Used in
$C_b$
$\delta_i$
$\Delta w_d$
$w_d$