ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Trumpy 5
Recent Posts
Another generator question
by gfretwell. 09/21/17 02:41 PM
What do you do?
by gfretwell. 09/21/17 02:33 PM
Supporting conduit bodies
by ghost307. 09/18/17 12:12 PM
Thermal Imaging Camera upgrade
by Potseal. 09/18/17 11:57 AM
Linear Power Supply Quits Under Load
by JoeTestingEngr. 09/15/17 11:37 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,858 Are you busy
176,615 Re: Forum
168,529 Need opinion
Who's Online Now
0 registered members (), 52 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#200459 - 04/02/11 01:56 AM Dropping 1 leg of 480 to control site lighting  
wewire2  Offline
Member
Joined: Nov 2002
Posts: 244
California
Is there a code reference that prohibits dropping 1 leg of a 480 circuit to control HID lighting? I notice 410.141(B) only applies to fixtures exceeding 1000V.


2017 / 2014 NEC & Related Books and Study Guides

#200480 - 04/02/11 10:37 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,863
Brick, NJ USA
Wewire2:

Care to explain the above with a little more clarity please.


John

#200485 - 04/02/11 11:39 PM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]  
wewire2  Offline
Member
Joined: Nov 2002
Posts: 244
California
Sure, thanks John.
3 phase 480, 3 wire is pulled to a light pole with 4
fixtures on the pole. The site engineer wants to drop legs to control the lights separately. I don't like the design but can't seem to find anything that prohibits it as long as the required disconnecting means is in place. What do you think?


#200486 - 04/03/11 01:05 AM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]  
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
Look at 410.104(B). I don't know if it applies but it could. Not sure what the Design Professional has in mind but this might help.

Last edited by George Little; 04/03/11 01:06 AM.

George Little

#200488 - 04/03/11 02:10 AM Re: Dropping 1 leg of 480 to control site lighting [Re: wewire2]  
wewire2  Offline
Member
Joined: Nov 2002
Posts: 244
California
George, I think that's what I'm looking for. The "auxiliary
equipment" terminology threw me off and I skimmed right past it. It appears that the term auxiliary equipment refers to ballast. Thank you sir!

410.104(B)Where supplied by ungrounded conductors of a circuit, the switching device of auxiliary equipment shall simultaneously disconnect all conductors.



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: 0.012s Queries: 15 (0.002s) Memory: 0.7678 MB (Peak: 0.9109 MB) Zlib enabled. Server Time: 2017-09-22 06:21:39 UTC