When did the NEC start requiring three branches (Life Safety, Critical and Equipment) of emergency power in a hospital?
I have a client whose hospital building was expanded in every decade since 1910, and at some point in that time, three branches of emergency power were not required. (hell, at one point *electricity* was not required...) Any building built before that date is grandfathered, according to the AHJ, and doesn't have to have the power separated until the next renovation comes through. Anything more recent than that date has to be renovated pronto or he'll lower the boom.
I don't want to debate the merits of three branches, that is obvious, and it is obvious that the client needs to start rewiring everything for patient safety. No question. My client would just rather not have to do it all at once in a great hurry, maybe take a couple of budget cycles to catch up.
Does anyone know the era that three branches began to be required?
I have a client whose hospital building was expanded in every decade since 1910, and at some point in that time, three branches of emergency power were not required. (hell, at one point *electricity* was not required...) Any building built before that date is grandfathered, according to the AHJ, and doesn't have to have the power separated until the next renovation comes through. Anything more recent than that date has to be renovated pronto or he'll lower the boom.
I don't want to debate the merits of three branches, that is obvious, and it is obvious that the client needs to start rewiring everything for patient safety. No question. My client would just rather not have to do it all at once in a great hurry, maybe take a couple of budget cycles to catch up.
Does anyone know the era that three branches began to be required?