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mixed voltages #77830
07/16/01 06:47 PM
07/16/01 06:47 PM
S
Steve T  Offline OP
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?

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Re: mixed voltages #77831
07/16/01 07:35 PM
07/16/01 07:35 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,360
no Opinion Steve, just confusion, would we need to go to 725-26?

Re: mixed voltages #77832
07/16/01 07:51 PM
07/16/01 07:51 PM
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
Re: mixed voltages #77833
07/16/01 08:52 PM
07/16/01 08:52 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,360
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.

Re: mixed voltages #77834
07/17/01 08:13 AM
07/17/01 08:13 AM
W
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.

Re: mixed voltages #77835
07/18/01 08:18 PM
07/18/01 08:18 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,360
http://www.iaei.com/ubb/Forum1/HTML/000376.html

well Steve, this should be interesting!

[Linked Image]


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