From: not.here@invalid.invalid   
      
   On Thu, 05 May 2011 14:54:03 -0700, Big Bad Bob wrote:   
      
      
      
   >   
   > in the power industry, high voltage lines are usually pipes rather than   
   > solid wire, because of skin effect.  lower weight, lower cost, AND   
   > similar conductivity for high voltage AC current.  makes sense.   
   >   
   > http://en.wikipedia.org/wiki/Electric_power_transmission   
   >   
   > (link to preclude trolling)   
      
      
   Also look for a product called Cuponal. Similar idea to the above, but   
   smaller. It's copper plated aluminium for making busbars. Similar   
   conductivity to copper at 50/60Hz because of skin effect but a lot   
   lighter and cheaper. You can joint it just like copper busbar.   
      
   --   
   Mick                      (Working in a M$-free zone!)   
   Web: http://www.nascom.info   
   Filtering everything posted from googlegroups to kill spam.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)