the conventional wisdom is 10bb. If see any decent cards in any position, then the thinking goes that for 10 bb your opponents have some fold equity. but to be honest for me i'll go down to about 5 bb before i shove with any face card or suited connectors. just my bias on carbon poker i won't shove an ace unless it's AQ or better or 10s or up in early position. however if it gets folded to me and i'm in late position i will shove with qj or better. just my opinion.