From: noone@nospam.com   
      
   Στις 13/8/2017 12:43 πμ, ο Bob έγραψε:   
   > Hello,   
   >   
   > Concerning the normal GFCI protectors/modules:   
   >   
   > Obviously they protect "downstream" like they are designed to.   
   >   
   > But does this protection also extend "upstream" ?   
   > If so, to where ?   
   >   
   > Thanks,   
   > Bob   
   nope, but if you "cascade" many GFCIs, you have to pick up them   
   correctly, so that a downstream trip doesn't trip the upstream one. So,   
   if for instance in a factory in the main panel you put one with a 30 mA   
   trip current, and downstream another with also 30 mA, you have to pick   
   an upstream "specially" rated so the downstream trip won't affect the   
   upstream breaker.   
      
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