Re: operating room emergency power
Like Steve, I too am uncertain what you are asking. You might be asking if you need two generators, in addition to the utility. That is, are you asking if you need to have the normal source (utility), and Emergency Source 1 (i.e., Generator 1), and Emergency Source 2 (i.e., Generator 2)? If so, that answer is no.
Can you clarify your question? Perhaps if you tell us why you are asking (e.g., conflicting instructions from engineer, or perhaps red tag from inspector), we might better understand the purpose of the question.