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#77830 - 07/16/01 06:47 PM mixed voltages  
Steve T  Offline
Member
Joined: Feb 2001
Posts: 306
Oak Park, IL, USA
Is it acceptable to run LV conductors in the same conduit with the regular voltage conductors.
For instance, undercabinet lighting with the xfmrs in the basement, run to a kitchen above in EMT with the 120v conductors.

I don't think anything is wrong with it, provided the insulation is rated for the highest voltage on all the conductors.

Any opinions?


2017 / 2014 NEC & Related Books and Study Guides

#77831 - 07/16/01 07:35 PM Re: mixed voltages  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,311
no Opinion Steve, just confusion, would we need to go to 725-26?


#77832 - 07/16/01 07:51 PM Re: mixed voltages  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
See Section 300-3(c) Conductors of Different Systems.



[This message has been edited by Joe Tedesco (edited 07-20-2001).]


Joe Tedesco, NEC Consultant

#77833 - 07/16/01 08:52 PM Re: mixed voltages  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,311
Yes yes,
but i think the original Q was to address Low-V , as in after a 120/12V X-former. Inasmuch as there is no definition of LV.


#77834 - 07/17/01 08:13 AM Re: mixed voltages  
WARREN1  Offline
Member
Joined: May 2001
Posts: 176
Greenville, SC, USA
Sounds like he is putting the ballast for a light fixture in the basement. Check the xfmrs secondary output voltage. It may be higher than you think. Of course, if the xfmr is truly a step down version, then as pointed out by Joe Tedesco, all the conductors in the same raceway, enclosure, or cable must be insulated for the highest voltage.


#77835 - 07/18/01 08:18 PM Re: mixed voltages  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,311
http://www.iaei.com/ubb/Forum1/HTML/000376.html

well Steve, this should be interesting!

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