Isolated power system

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m sleem

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I'm in a project where we have #two IP panels in each operation room, would that just to meet the code requirements of having two different power supplies from two different ATSs as per 517.19(A) or it's not code requirements and one IP panel was sufficient?.
 
517.19 requires one of two choices. Either supply the room with a normal and critical IP, or supply the room with two IP's on the critical branch supplied by separate transfer switches. Most of the time AHJ's require all power within OR's to be fed from IP's, so hence the two panels.
 
For what it's worth, Isolated Power panels are not required in an operating room. Assuming it's classified by clinicians as a wet location, you could provide GFI protected outlets instead.
 
For what it's worth, Isolated Power panels are not required in an operating room. Assuming it's classified by clinicians as a wet location, you could provide GFI protected outlets instead.

You're right as far as NFPA 99 and NFPA 70 are concerned but, as LIM mentions, it is up to the AHJ. In NC they are required by the state and maybe in Cairo too.

Roger
 
You're right as far as NFPA 99 and NFPA 70 are concerned but, as LIM mentions, it is up to the AHJ. In NC they are required by the state and maybe in Cairo too.

Roger
Just to be clear on this, North Carolina and Michigan (and perhaps other states?) have documented NEC amendments requiring IP. If that's what you're referring to by AHJ, then I agree -- every state is free to amend the NEC as they see fit.

But some random inspector in a state -- with no written amendment requiring it -- does not have the power to enforce "IP only" in an OR. Of course that applies to any NEC issue, not just this one.
 
Just to be clear on this, North Carolina and Michigan (and perhaps other states?) have documented NEC amendments requiring IP. If that's what you're referring to by AHJ, then I agree -- every state is free to amend the NEC as they see fit.

But some random inspector in a state -- with no written amendment requiring it -- does not have the power to enforce "IP only" in an OR. Of course that applies to any NEC issue, not just this one.
And just to be clear on this too, we are referring to the AHJ, not some rogue inspector. The AHJ in NC is the Building Code Council which is part of the Department of Insurance and Office of the State Fire Marshal.

As an aside I believe Fl and SC still require Isolation Panels too.

Roger
 
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