Calculate the resistance of a copper (annealed)

[Lee Gold]

what's the difference annealed?

Calculate the resistance of a copper (annealed) conductor 35m long that has a C.S.A of 2.5mm2?

 

[telectrix]

very little difference in annealed and non-annealed copper. i'd just use tables from BS7671/OSG:

Electrical Conductivity (Volume) at: 20°C (annealed) 58.0-58.9 MS/m (m/Ωmm2 ) 20°C (annealed) 100.0-101.5 % IACS 20°C (fully cold worked) 56.3 MS/m (m/Ωmm2 ) 20°C (fully cold worked) 97.0 % IACS

Electrical Resistivity (Volume) at: 20°C (annealed) 0.017241-0.0170 20°C (annealed) 1.724-1.70 20°C (fully cold worked) 0.0178 20°C (fully cold worked) 1.78 Electrical Resistivity (Mass) at 20°C (Annealed) Mandatory maximum 0.15328 µΩg/m