Cable Configuration
Formula
BS 7671 / IEC 60364-5-54 Formula
K = √[Qc(β+20)/ρ₂₀ × ln((β+θf)/(β+θᵢ))]
Where:
Qc = Volumetric heat capacity (J/K·cm³)
β = Reciprocal of temp coefficient (K)
ρ₂₀ = Resistivity at 20°C (μΩ·cm)
θᵢ = Initial temperature (°C)
θf = Final temperature (°C)
Qc = Volumetric heat capacity (J/K·cm³)
β = Reciprocal of temp coefficient (K)
ρ₂₀ = Resistivity at 20°C (μΩ·cm)
θᵢ = Initial temperature (°C)
θf = Final temperature (°C)