13.2kV & 480V Conduit Separation

[mhuckaby]

Is there any reason (safety, technical, or otherwise) that 13.2 kV and 480V conduits cannot be run on the same conduit rack?

If so, what should be the minimum separation between conduits of these two voltages?

Thanks!
Mike

 

[dpc]

Both can be run on the same rack and there is no required separation distance between conduits per NEC, that I am aware of.

I would segregate the high voltage conduits away from the low voltage conduits to the extent possible, just for increasing awareness of high voltage circuits.

 

[lyledunn]

What is a rack? Regards,

Lyledunn

 

[peebee]

You can pretty much do whatever you want with your conduits, there's no requirement for separation. As a matter of practicality, though, you'll probably need about 2" minimum betwen them to get a wrench in to the connectors.

 

[meihm]

Although there is not a Code requirement per se, there is hidden in the National Electrical Code (in the NEC Handbook commentary for article "310-15 Ampacities.&quot some sage advice.

In sum and substance, the advice is to maintain conduit Center to Center spacing as would be used in laying out conduits for entry into a junction box. "...Field experience has indicated this degree of spacing between runs has not caused any problems....". 1996 NEC Copyright 1995 NFPA.

This is consistent with the empirical nature of the ampacities cited in the code.

 

[shaari2002]

It can be run on the same rack for power conduit but if possible try to provide space between them.There were some effect on the excitation but it will cancell each others. Normally the separation is require when involved with instrumentation system which using DC voltage or mA signal.

 

[jbartos]

Suggestions: The following needs to be noticed:
1. Industry practices, e.g. nuclear, non-nuclear
2. Grounding practices, IEEE Stds 80, 142, etc.
3. Type of conduits
4. Etc.