Cable Calc Formula _hot_

[ V_d = \sqrt3 \cdot I \cdot L \cdot (R \cos\phi + X \sin\phi) \quad \text(3-phase) ]

: This is a nonlinear equation because (R) depends on temperature. Engineers typically iterate using correction factors ((k_1, k_2, k_3)) from standards (IEC 60287, NEC Table 310.16). cable calc formula