Cable Calc Formula ✦ Confirmed & Premium

[ I = \sqrt\frac\theta_max - \theta_ambR_dc \cdot \left(1 + \alpha(\theta_max - 20)\right) \cdot \left( R_th \right) ]

And always, always derate for grouping.

The core relationship is:

[ S = \fracI \cdot \sqrtt\kappa \quad \text(adiabatic) ] cable calc formula