This is also wrong, Wikipedia is your friend. Cross-sectional area of true American Gauge 4AWG is 21.2 mm^2. 1AWG is 42.2 mm^2, so its more accurate to say that 2x4AWG = 1x1AWG. 1/0 AWG is 53.3 mm^2. This wire here however is a whopping 107 mm^2, which is about 5x4AWG, and is exactly double that...