If the panelboard is marked 120/208 and it is connected to 120/240, will you write that up as a violation? I've had to do so a couple of times when electricians have used "loadcenter" grade panels. At least one manufacturer (Cutler Hammer) has 3 phase panels with plug on breakers listed for 120/208 only, if you want a 120/240 3 phase, you have to step up to a bolt on breaker.


Few things are harder to put up with than the annoyance of a good example.