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#77830 - 07/16/01 03:47 PM mixed voltages
Steve T Offline

Registered: 02/14/01
Posts: 312
Loc: 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?

2014 / 2011 NEC & Related Books and Study Guides
#77831 - 07/16/01 04:35 PM Re: mixed voltages
sparky Offline

Registered: 10/18/00
Posts: 5545
no Opinion Steve, just confusion, would we need to go to 725-26?

#77832 - 07/16/01 04:51 PM Re: mixed voltages
Joe Tedesco Offline

Registered: 10/07/00
Posts: 3325
Loc: 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 05:52 PM Re: mixed voltages
sparky Offline

Registered: 10/18/00
Posts: 5545
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 05:13 AM Re: mixed voltages
WARREN1 Offline

Registered: 05/09/01
Posts: 184
Loc: 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 05:18 PM Re: mixed voltages
sparky Offline

Registered: 10/18/00
Posts: 5545

well Steve, this should be interesting!


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