XPost: alt.binaries.chatter   
   From: no@spam.com   
      
   On Wed, 01 May 2013 15:59:33 +0100, David Moorman    
   wrote:   
      
   > In article , "Major Scott"    
   > wrote:   
   >   
   >> I have a USB hard disk enclosure, and I'm running it without it's case as   
   I'm   
   >> testing another drive with it.  When I touched the hard disk with my hand   
   and   
   >> the case of the computer (which is earthed) with my arm, I felt a tickle.    
   So   
   >> I connected a multimeter to it, and the hard disk is at 90 volts AC with a   
   >> short circuit current of 0.136 mA.  Is this normal?  Is this a good idea   
   when   
   >> working with delicate computer electronics?  I suppose the ground of the USB   
   >> lead will get rid of it but it seems a bit odd.  The USB disk unit is   
   powered   
   >> by a cheap wall wart that came with it, rated 12V DC 1.5A.   
   >   
   > Something is effed up.   
      
   It works though.   
      
   I've had a similar voltage out of the composite output of a VCR.  That's the   
   trouble with these double insulated things that aren't earthed.   
      
   --   
   I had some words with my wife, and she had some paragraphs with me.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)