# Specific electrical resistivity of armour 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
$\rho_{ar}$
Unit
$\Omega$.m
Used in
Choices
ConstructionValue
Cu1.7241e-08
Al2.84e-08
Brz3.5e-08
CuZn3.9e-08
S1.38e-07
SS7e-07