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Elctrical Resistivities & Temperature Coefficients

The following table is taken from IEC 60287-1-1:2006 "

Material	Resistivity (ρ) Ω.m at 20 °C	Temperature Coeffiicent (α₂₀) K^-1 at 20 °C
- conductors
Copper	1.7241 10-8	3.93 10-3
Aluminium	2.8264 10-8	4.03 10-3
- Sheaths & Armour
Lead or lead alloy	21.4 10^-8	4.0 10^-3
Steel	13.8 10^-8	4.0 10^-3
Bronze	3.5 10^-8	3.0 10^-3
Staninless steel	70 10^-8	negligible
Aluminium	2.84 10^-8	4.03 10^-3

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