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Specific electrical resistivity of sheath material

Values for specific electrical resistivity of sheath material at 20°C. are taken from standard IEC 60287-1-1 Ed.2.1 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
Related
$M_{sh}$
Material of sheath
Used in
$\beta_1$
Substitution coefficient $\beta_1$ for eddy-currents
$m_{z,sh}$
Parameter m of sheath
$R_{sh}$
Electrical resistance of sheath [$\Omega$/m]
$\rho_s$
Specific electrical resistivity of shield [$\Omega$.m]
$\mathscr{z}_{3,sh}$
Impedance of sheath inner surface [$\Omega$/m]
$\mathscr{z}_{4,sh}$
Mutual impedance of sheath [$\Omega$/m]
$\mathscr{z}_{5,sh}$
Impedance of 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