Equivalent resistance of screen $R_{sco}$ and resistance of sheath $R_{sho}$ in parallel at 20°C.

Symbol
$R_{\mathrm{so}}$
Unit
Ω/m
Formulae
$\frac{R_{\mathrm{sc}} R_{\mathrm{sh}}}{R_{\mathrm{sc}} + R_{\mathrm{sh}}}$single-core cables
$\frac{R_{\mathrm{sc}} R_{\mathrm{sh}}}{R_{\mathrm{sc}} + R_{\mathrm{sh}}}$multi-core cables type SS
$\frac{3 R_{\mathrm{sc}} R_{\mathrm{sh}}}{R_{\mathrm{sc}} + 3 R_{\mathrm{sh}}}$multi-core cables type SC
$\frac{3 R_{\mathrm{sc}} R_{\mathrm{sh}}}{3 R_{\mathrm{sc}} + 3 R_{\mathrm{sh}}}$multi-core cables type CC
$0$without screen and sheath
$R_{\mathrm{sh}}$
Used in
$R_{\mathrm{0}}$