I assume that the IBC's reference to NFPA 13-10 is the 2010 edition of the NFPA 13. So, the question is the sprinklering or not sprinklering of electrical rooms. The last sentence of IBC/IFC 903.3.1.1.1. paragraph before the six numbered exceptions disallows omission of a sprinkler system into the electrical equipment room even it the room is fire rated or not fire rated. If the NFPA allows this type of room to be fire rated for omission of the sprinkler, is the fire rating to be the top and bottom of the room as well as the walls? What does the NFPA 13-10 state? I got a copy from an Engineer of NFPA of section 8.15.11.3 but he did not list the year edition of NFPA.