can I use Different voltages in same duct bank
can I use Different voltages in same duct bank
(OP)
Can I run a 12,470 volt conduit in the same duct bank as my 480 conduits? If not how much separation would I need?? I have look in the NEC but can't seem to find anything on this. Any input would be appreciated.






RE: can I use Different voltages in same duct bank
I have 2005 NEC with me.
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RE: can I use Different voltages in same duct bank
We generally split out separate manholes/handholes for the 15 kV (or any medium-voltage) cables. Then if you use 600 V insulation for all low-voltage cables, they can occupy the same space in a manhole/handhole. The other option is to provide a barrier of some type within the manhole to isolate the 12 kV from the lower voltages.
It's good practice to keep the 12 kV ducts segregated in one portion of the duct bank. We sometimes put two duct banks in a common trench to increase separation, but this is not required by the NEC, AFAIK.
RE: can I use Different voltages in same duct bank
Rafiq Bulsara
http://www.srengineersct.com
RE: can I use Different voltages in same duct bank
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This is normally the space where people post something insightful.
RE: can I use Different voltages in same duct bank