ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 5
Recent Posts
What do you do?
by gfretwell. 09/24/17 12:05 PM
75 kva tranformer
by sparkync. 09/23/17 06:41 PM
Another generator question
by gfretwell. 09/23/17 04:15 PM
Supporting conduit bodies
by ghost307. 09/18/17 12:12 PM
Thermal Imaging Camera upgrade
by Potseal. 09/18/17 11:57 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,932 Are you busy
176,732 Re: Forum
168,584 Need opinion
Who's Online Now
0 registered members (), 42 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#174679 - 02/11/08 06:00 PM Grounding in Control Panels  
rwilsond  Offline
New Member
Joined: Aug 2005
Posts: 5
Rancho Santa Margarita, CA
Section 409.60 of the 2005 NEC refers to "Multisection industrial control panels", but there is no definition. What would be an example of a Multisection industrial control panel? Would it be multiple sub-panels in a common enclosure?

Also, the second sentence of 409.60 seems ambiguous. Is a grounding bus required for a Multisection industrial control panel?


2017 / 2014 NEC & Related Books and Study Guides

#174682 - 02/11/08 06:39 PM Re: Grounding in Control Panels [Re: rwilsond]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
In a previous life, I used to be control panel assembler. On big assembly lines, we could have 6 Hoffman 4' wide by 6' tall enclosures bolted together to make 1 long-ass control cabinet. I think that would qualify as a "Multisection Industrial Control Panel."

Also look at multi-cabinet control consoles for control rooms at large industrial facilities, nuclear plants, etc.

Larry C


#174707 - 02/12/08 07:32 AM Re: Grounding in Control Panels [Re: LarryC]  
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,209
Chesapeake, VA
I believe they're referring to large switchboard-style cabinets.

409.2 defines "Industrial control panel" and refers to pretty much anything, including breaker panels, switchgear, MCC, pushbuttons, etc. 409.60 just wants to make sure you properly bond them all together if they're installed as a single multisection unit. If you mount individual industrial control panels 1" apart, I do not believe 409.60 applies.

Edit: 409.2 was re-written in 2008, but doesn't appear to really change the definition, just presents it differently.

Last edited by SteveFehr; 02/12/08 07:33 AM.


Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.025s Queries: 15 (0.006s) Memory: 0.7517 MB (Peak: 0.8779 MB) Zlib enabled. Server Time: 2017-09-25 13:15:04 UTC