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#202028 - 07/11/11 11:37 AM 700.27 Coordination  
Bravo  Offline
Member
Joined: May 2010
Posts: 30
NY, USA
Hello,

I have an existing emergency power dist. system with life safety & non-life safety loads. There is a requirement to add new life safety branch circuits. The existing emer. pwr system currently does not have overcurrent devices selectively coordinated.

Once we modify the existing system, is a coordination study required per NEC 700.27? The system was designed and constructed prior to 2005 NEC.

Thanks in advance.


2017 / 2014 NEC & Related Books and Study Guides

#202029 - 07/11/11 03:20 PM Re: 700.27 Coordination [Re: Bravo]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,803
Brick, NJ USA
dbravo:

I would discuss your situation with the AHJ in the town the project is in.

The extent of the mods you have to perform may be the deciding factor.



John


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