Cable Size — Electrical

#2 AWG: 1.54 ohms/1000 ft → R = 0.46 ohms → VD = 9.2V (7.7%) – getting close.

Using approximate method: #12 AWG (6.5 ohms/1000 ft) → R total = 2×150/1000×6.5 = 1.95 ohms. VD = 20×1.95 = 39V (32%!) → completely unacceptable. electrical cable size

#1/0 AWG: 0.98 ohms/1000 ft → R = 0.29 ohms → VD = 5.8V (4.8%) – acceptable. #2 AWG: 1