European Terminal or "choc blocks" go right up in size to at least 60A. In my brico there are blocks of many sizes which will take up to 5/16" [8mm] solid wire. Actually they are all a PITA - trying to manipulate the wires into the hole, line up the block with all your other wiring fighting back, getting the screwdriver aligned, avoid the wires on either side and always worrying "is it tight?" , and then trying to make an orderly safe assembly in the box without ramming it all in like a bird's nest, which means big junction boxes. Worse is when one side of the brass screw slot decides to shear off just as you give it that extra 'just to be sure' tweak- now you can't undo it either!
Alan
