Feeder riser clamp

[NAZ55]

Is anyone aware of any non magnetice or non metallic feeder rised clamp to avoid any magnetic coupling and circulating current in the clamp itself?

If you do I will appreciate a quick response.

Thanks a lot in advance.

 

[resqcapt19]

zazmat,
Thanks...that makes sense to me and I have seen the results when this is not done correctly. When I see the word cable, I just normally think of multiple conductors, not single conductors.
Can I ask another question? Why such a big cable? Wouldn't parallel smaller cables be more cost effective?

 

[waross]

To be more specific I need to clamp aluminum pipe about 3-4" containing two 15kV 2000kcmil shielded cables to the the riser pole. The concern is the circulating current in the clamp due to magnetic coupling.

This sounds like two single conductors per phase. I don't think that two 3c 2000kcmil cables will fit in a 3" coduit.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[NAZ55]

waross you are correct. These are two single conductors per phase. 2-2000kcmil paralleled together. I apologize if my use of term cable threw everyone off.

resq,
I hope it answered your question as well.
Also, how many parallel conductors would you recommend?

This is not my project so I don't have much of the details as to what's the loading is etc.

I raised this question for my information and learning purpose.

The goal was to findout some clamps which can break magnetic coupling when there's only one phase going through them, and not act as CTs with circulating current running in them. I am not much concerned with the size of the cables or paralleling techniques.

 

[stevenal]

Parallel conductors are common on low voltage, but not at 15kV. Much more insulation is needed, semi-conductor, etc.
And nothing gained since a single faulted cable will still take out the circuit.