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Specific electrical resistivity sheath material

Values for specific electrical resistivity of sheath material at 20°C. are taken from standard IEC 60287-1-1 where available and from standard technical handbooks for the others. The standard provides a different value of aluminium conductor and sheaths and armour.

Symbol
$\rho_{sh}$
Unit
$\Omega$.m
Formulas
$\rho_{sh} \left(1+\alpha_{sh} \left(\theta_{sh}-20\right)\right)$
Related
$\alpha_{sh}$
Temperature coefficient sheath material [1/K]
$M_{sh}$
Sheath material
$\theta_{sh}$
Temperature sheath [°C]
Used in
$\beta_1$
Substitution coefficient $\beta_1$ for eddy-currents
$m_{z,sh}$
Parameter m sheath
$R_{sh}$
Electrical resistance sheath [$\Omega$/m]
$\rho_s$
Specific electrical resistivity shield (screen/sheath) [$\Omega$.m]
$\mathcal{Z}_{3,sh}$
Impedance sheath inner surface [$\Omega$/m]
$\mathcal{Z}_{4,sh}$
Mutual impedance sheath [$\Omega$/m]
$\mathcal{Z}_{5,sh}$
Impedance sheath outer surface [$\Omega$/m]
Choices
MaterialValueReference
Cu1.7241e-08IEC 60287-1-1
Al2.84e-08IEC 60287-1-1
Pb2.14e-07IEC 60287-1-1
Brz3.5e-08IEC 60287-1-1
S1.38e-07IEC 60287-1-1
SS7e-07IEC 60287-1-1
Zn6.11e-08engineeringtoolbox.com