A lug rated for more than 1 conductor looks like a snowman from the top..although I dont think this is the case for a 200 amp panel. I d like to hear where that wire is going and if there are other conductors with it.
Any time you tap a main like that it would think it is a violation. Tap rules also come to mind. I see AC contractors doing this to add a two circuit panel for their condensers. The only thing I would think is not a violation is a surge arrestor. Even that you still have the lug rating issue.
I don't know about the olden days, but fire pumps should come In as there own services. To tap that of the main lugs like this would surely be a violation. If it had it's own tap section off of the service entrance conductors then it would be ok.
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