517.63 Grounded Power Systems in Anesthetizing Locations.
(A) Battery-Powered Emergency Lighting Units. One or more battery-powered emergency lighting units shall be provided in accordance with 700.12(F).
Yes, this is in addition to generator backed up circuits.Are you talking about an battery powered light fixture in addition to fixtures being served by the essential electrical system?
Check out 517.63(A)
Chris
Try NFPA 101 7.9
Actually, this is not an NFPA 101 chapter 7 (Means of Egress) issue, these are only to keep the OR illuminated until the generators come on line.
It's not a good idea to have a surgeon fumbling around in the dark even for a few seconds.
Roger