I have an electrical room, no transformer, 1hr rating, and the door does not go into an exit corridor, Is the door rating 45 or 60 minutes?
We don't know. It may possibly even be less than that. You are going to have to check with the architect or the person responsible for the design of that building. It all depends on what you have there.
I take it you're looking at NFPA 101 Table 188.8.131.52 and wondering if there may be another reason to require a true 60 minute door, vs. the "standard" 45 min door in a 60 min fire barrier?
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