ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Explored: Basics of PLC
by niamishra. 10/19/18 04:44 AM
Linear Power Supply Quits Under Load
by JoeTestingEngr. 10/18/18 08:47 PM
220/230/240V 60Hz Systems
by dsk. 10/17/18 01:25 PM
PLC/HMI Enclosure C2, D1
by ghost307. 10/16/18 03:31 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 39 guests, and 29 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
700.27 Coordination #202028
07/11/11 11:37 AM
07/11/11 11:37 AM
B
Bravo  Offline OP
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
Re: 700.27 Coordination [Re: Bravo] #202029
07/11/11 03:20 PM
07/11/11 03:20 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 7,036
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

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Show All Member Profiles 
Top Posters(30 Days)
sparky 11
Popular Topics(Views)
250,429 Are you busy
188,033 Re: Forum
177,614 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 15 (0.004s) Memory: 0.9430 MB (Peak: 1.0612 MB) Zlib enabled. Server Time: 2018-10-19 13:28:29 UTC