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#202028 - 07/11/11 08:37 AM 700.27 Coordination
Bravo Offline

Registered: 05/04/10
Posts: 30
Loc: NY, USA

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.

2014 / 2011 NEC & Related Books and Study Guides
#202029 - 07/11/11 12:20 PM Re: 700.27 Coordination [Re: Bravo]
HotLine1 Offline


Registered: 04/03/02
Posts: 6792
Loc: Brick, NJ USA

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.


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