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Electrical resistance of shield

Equivalent resistance of screen $R_{sc}$ and resistance of sheath $R_{sh}$ in parallel.

Symbol
$R_s$
Unit
$\Omega$/m
Formulae
$\frac{R_{sh} R_{sc}}{R_{sh}+R_{sc}}$screen and sheath
$\frac{R_{sc} R_{skid}}{R_{sc}+R_{skid}}$screen and skid wires
$\frac{R_{sc} R_{skid} R_{sh}}{R_{sc}+R_{skid}+R_{sh}}$screen and skid wires and sheath
$0$without screen and sheath
Related
$R_{sc}$
Electrical resistance of screen [$\Omega$/m]
$R_{sh}$
Electrical resistance of sheath [$\Omega$/m]
$R_{skid}$
Electrical resistance of skid wires [$\Omega$/m]
Used in
$E_a$
Induced shield voltage in phase a [V/m]
$I_{kx}$
Split fault current [A]
$I_s$
Induced circulating current shield [A]
$R_e$
Electrical resistance of shield and armour [$\Omega$/m]
$RF$
Reduction factor
$V_{ab}$
Voltages between shields/sheaths at the cross-bonding points phases a-b [V]
$V_{ac}$
Voltages between shields/sheaths at the cross-bonding points phases a-c [V]
$Z_s$
Self impedance of metal screen with earth return [$\Omega$/m]