From: JERONI.PAUL@terra.es   
      
   Carlos E.R. wrote:   
   > Same problem as if I am in the bath, somebody else in the kitchen, the    
   > RCD triggers, the other person resets it manually and immediately. It    
   > will not hold.   
      
   Bad idea. Water pipes and water heaters are earthed together with the rest of   
   appliances, if any has a short to ground it will be dumping the full mains   
   voltage to the water pipes. If all is well this will trip the protector fast   
   enough to save your life    
   assuming you was taking a bath. Think about it, you really want to keep trying   
   to see if it keeps saving your life again and again?? Don't forget the   
   protector could eventually fail as well.   
      
   Also keep in mind that when "it will not hold", it is connecting the power   
   back for some milliseconds. It has no other way to detect a leak than to apply   
   power and check. I would not keep trying if someone is in the bath.   
      
   > This is certainly bad wiring, but I fail to see why it would make the    
   > RCD trigger every day at 6:30, when there was a voltage surge from the    
   > transformer station. The electrician that found the problem was baffled.    
      
   My theory is that asymmetric wiring will behave like an antenna, a magnetic   
   pulse for example from lighting, strong interference or heavy machinery nearby   
   will induce a current in one wire different than the other. Also the opposite,   
   all transients and    
   spikes coming from mains will be radiated more from one wire than the other   
   resulting in an imbalance. Not to mention different stray capacitance and   
   inductance caracteristics from the different wiring paths affecting the   
   response to fast transients.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)