what scale do cadet entry captains go on? C scale or it goes up by rank?
You do actually realise that there is no such thing as C-Scale? It is just an affectionate term given to the B-Scalers that aren't on ex-pat terms.
Promotion to different ranks does not put you on a different scale. But yes, LEC will always remain on the B-Scale (C -Scale) regardless of the new 36K per month available to them.