I've read both article's 770,362 & Table's C2, C2a. I was asked a qeustion about what would be the cross-sectional area of a 1/2" ENT with 2 OFN cables. I guessed 40% for over 2 wires( table 4), because of the bending radius, but not sure. I don't even think you can fit 2 OFN Cables in a 1/2" ENT, but I could be wrong , hopefully somebody out there can help solve this question 