From: me@somewhere.invalid   
      
   Tidying up my shed workshop I got an electric shock from a cable pair   
   that had earlier been disconnected from its 14V DC power supply. So I'd   
   expect it to have virtually zero voltage across it, apart from ac noise.   
   Its destination is a garden lamp relay box about 80 ft away from the   
   supply. For some of that distance it runs close to a mains cable   
   (unloaded at the time).   
      
   My DMM consistently reports 21V AC. And 0.56 mA AC shorted across the   
   pair.   
      
   Before I dig around in the undergrowth to get access to the   
   (weather-proofed) relay box...   
   Q1: Does that quite high and steady level of voltage result from a   
   capacitive effect?   
   Q2: Is that really enough to give me a shock?   
      
   Terry, East Grinstead, UK   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)