CU Conductor Bend Radii

[CardiffReef]

I need specs for bare stranded copper conductor properties. Specifically bend radii for conductors range 4/0 to 750.

I have spent 2 days scouring the internet, and wire manufacturer's web sites, and have found ZERO!

Any and all help is greatly appreciated.

CardiffReef

 

[BJC]

Hers a couple for you.

http://www.okonite.com/engineering/bending-ratios.html

http://www.romecable.com/E005.html

 

[jbartos]

Suggestion: Visit

http://www.generalcable.com/North_America/NorthAMCat.html

technical specifications and particular cables for more info

 

[redtrumpet]

Note the links posted above are for insulated cables. I have never seen bending radii listed for bare (uninsulated) copper conductors.

What are you using the bare copper for?

 

[CardiffReef]

Conductor is Twin 750 CU drop from 12kV bus to Roof mounted bushings on Metal Clad 12kV switchgear.

 

[redtrumpet]

Is the 12 kV bus strain (cable) or rigid (pipe or flat)? What is the connector on the roof bushings (stud or split bolt)? Is the bending radius problem caused at the connector, ie. by making a 90 degree turn off the connector, or are you trying to rely on a bend in the conductor to maintain clearance?

Generally, a good design will use connector types and bus arrangements to eliminate extreme bends, both to relieve the conductor and to eliminate bird traps and possible corona (unlikely at 12 kV). You may also be able to use cable braids instead of stranded conductor - the former are extremely flexible.

 

[dpc]

As Redtrumpet alludes to, there are a wide variety of stranding configurations available in bare copper conductor. Rope stranding can be obtained and is highly flexible. There are many other configurations available as well.

You might want to contact Southwire.