The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Locked rotor, no burnout
by andey
Today at 04:48 AM
Temporarily feeding a panel...
by Potseal
Yesterday at 11:05 PM
Massive power outage South Australia
by Meadow
Yesterday at 06:46 AM
short circuit??
by Meadow
Yesterday at 06:43 AM
Norwegian power?
by Meadow
Yesterday at 06:36 AM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 14
sparky 10
sparky66wv 8
gfretwell 8
Potseal 7
Who's Online
1 registered (gfretwell), 282 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#202028 - 07/11/11 08:37 AM 700.27 Coordination
Bravo Offline
Member

Registered: 05/04/10
Posts: 30
Loc: 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.

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

Member

Registered: 04/03/02
Posts: 6786
Loc: 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

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals