breaks depend casino to casino though, the place i worked they had a push rotation, you did 20 mins at each table and rotated around the pit so you might start dealing BJ then spanish 21, then pai gow, then to a spanish 21 table, get a break, then deal another 4-5 tables before a break
i had one night i dealt 8 hours straight without seeing the breakroom, break kept getting pushed 1 table past where i was at, i knwo some people got in trouble for that night. i think it changes casino to casino but the standard seems to be 20 off 40 on though outside of calif.
dealing is so math intensive though after 8 hours of dealing if i went and played i couldnt even hardly add my own hand totals some days.
ccl