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mixed voltages #77830 07/16/01 06:47 PM
Joined: Feb 2001
Posts: 308
S
Steve T Offline OP
Member
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
Joined: Oct 2000
Posts: 5,389
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sparky Offline
Member
no Opinion Steve, just confusion, would we need to go to 725-26?

Re: mixed voltages #77832 07/16/01 07:51 PM
Joined: Oct 2000
Posts: 2,749
Joe Tedesco Offline
Member
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
Joined: Oct 2000
Posts: 5,389
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sparky Offline
Member
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
Joined: May 2001
Posts: 176
W
WARREN1 Offline
Member
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
Joined: Oct 2000
Posts: 5,389
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sparky Offline
Member
http://www.iaei.com/ubb/Forum1/HTML/000376.html

well Steve, this should be interesting!

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