What‘s the smallest size copper cable that can be used for a 132k Volts transformer at 700 Amps.
USE TWO AWG# 500 WIRES IN PARALLEL TO OBTAIN AT LEAST 700A.
That would likely be done with Copper buss bar for a short distance with proper shielding and standoff insulators. Something like 2000 mcm (uninsulated in free air) might pass local Code with sufficient elevation over a short distance
Off the top of my head, I'm going with 4-ought copper.
