From: wwm@wwmartin.net   
      
   On 2/27/26 01:25, Liz Tuddenham wrote:   
   > Brian Gregory  wrote:   
   >   
   >> On 22/02/2026 19:59, Liz Tuddenham wrote:   
   >>> Brian Gregory  wrote:   
   >>>> With all good safely made brands of HRC fuse it means the fuse should   
   >>>> stay intact if the peak current is under 30kA, and exceeding 30kA is   
   >>>> likely to cause the fuse to explode and potentially damage other parts   
   >>>> of the equipment it is a part of.   
   >>>   
   >>> ...like the venetian blind slats on the other side of the room (yes, it   
   >>> happened to me whlst testing equipment with the covers removed).   
   >>   
   >> Ouch!   
   >   
   > There was an earth strap hidden on the back of the fuseholder block and   
   > my workshop was quite close to the electricity substation.   
   >   
   > I only discovered the strap when I gathered up the remains of the   
   > fuseholders and pieced them back together.   
   >   
   >   
   I wonder how much current it took to vaporize a 2KW wirewound resistor?   
   It had something to do with a pressurized waveguide that developed a   
   leak and arced internally... Impressive, nothing left but the metal end   
   cylinders!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)