Electrical engineering
Cable sizing and current
Cross-section from voltage drop, current density and allowable current.
Electrical engineering
Single-phase cable section from voltage drop
S = 2ρLI / ΔU→Electrical engineeringThree-phase cable section from voltage drop
S = √3ρLI / ΔU→Electrical engineeringCable current density
J = I / S→Electrical engineeringAllowable current from density
I = JₘₐₓS→Electrical engineeringCable section by material and system
S = kρLI/ΔUₘₐₓ→