1st question :- Alminum cable lugs are used for different cables, (a) Power cable LT 415V, 230V duty as well as for (b) 11kV/6.6kV/33kV duty also. If we keep current rating same , whether different sizes of lugs are recommended. ( it may be noted that fault level at higher voltages are more .)
We are confused certain manufacturer supplies cable joint kits with cable lugs of longer tail.

2nd question :- For HT XLPE cables ( since conductor cross section is perfectly circular, any special punching/crimping technique is needed ?