Thank you Tony.
This is exactly what i am seeing. Even in 200A panels. It would seem CSA standards address the issue of 'Live Work' where our UL ( and other NRTL's) do not.
The jist of NFPA 70 E & subpart S could basically be stated as either shuting down, or in the cases where it cannot be, proper PPE to work on such, dictated by proximty, etc.....
As one can easily shut the main off here , the entrance conductors remain live to it,and exposed,,lacking the the simple isolation CSA addresses here.
We do not, per CSA example, put our NEMA $$$$ where our 'safety' mouths are......