brother
Senior Member
I know 2008 NEC 517.17 forbids 'additional levels of ground fault protection to be installed on the (emergency) essential electrical system in a hospital.
But why on earth would you have one on it at all?? It just seems the risk of losing power in an operating room is greater than the risk of the equipment possibly burning up without the ground fault protection. Alot of them I have seen the settings were set too low, and they were not properly coordinated even on the normal system.
Just had a convo with another electrician and he was emphasizing the 'additional level' language in the article. He says technically they can install a single level, just not an additional.
I must say I have never seen any GFP on new emergency systems in hospitals (old ones yes), much less a violation of having an additional level. So maybe yes they can technically do it, but why on earth would any one do it?? Has anyone ever seen emergency systems (feeders) in hospitals with GFP on the load side of the transfer switch?
But why on earth would you have one on it at all?? It just seems the risk of losing power in an operating room is greater than the risk of the equipment possibly burning up without the ground fault protection. Alot of them I have seen the settings were set too low, and they were not properly coordinated even on the normal system.
Just had a convo with another electrician and he was emphasizing the 'additional level' language in the article. He says technically they can install a single level, just not an additional.
I must say I have never seen any GFP on new emergency systems in hospitals (old ones yes), much less a violation of having an additional level. So maybe yes they can technically do it, but why on earth would any one do it?? Has anyone ever seen emergency systems (feeders) in hospitals with GFP on the load side of the transfer switch?