Why does the adiabatic equation (and associated tables of k values) appear in both sections 434 and 543? Okay, so one is referring to line conductors and the other to protective conductors (and so will have different initial temperatures), but it's all much of a muchness, and surely could be combined. It also seems a bit strange that one is in part 4 while the other is in part 5. It all seems a bit arbitrary.
PS - fun fact: none of the following appear in the BS 7671 index: 'adiabatic equation', 'equation, adiabatic', 'I2t', 'let-through', 'current, let-through'. Although to be fair, 'k values' does.
