From: bobnospam@gmail.com   
      
   On 6/10/2023 5:52 AM, whit3rd wrote:   
   > On Sunday, June 4, 2023 at 9:50:55 PM UTC-4, bob prohaska wrote:   
   >> I've been given a collection of residential service panel breakers   
   >> and would like to check them to see if they trip correctly. They   
   >> were in use before I got them, so they certainly close correctly,   
   >> but it's unknown if they trip correctly.   
   >>   
   >   
   > If they're thermal breakers, the only part that can fail while retaining   
   > the on/off function is a heater.   A welder intended to melt metal   
   > applied to a heater is... maybe not a test that should be applied.   
   >   
   > The heater, if it fails open, won't let the breaker pass current.   
   > If it fails closed circuit... there's extra metal inside the breaker?   
   >   
   > Circuit breakers should, and generally do, fail in safe ways.   
   > Go ahead and use them without applying a stress test beyond normal   
   > currents and voltages.   
      
   If the breakers trip using a heater, then the setting of the welder (AC)   
   output current will not represent the current that the breaker actually   
   would trip at on line voltage, because the welder voltage likely will be   
   lower   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)