Re: [TCML] pig Jacobs

[Mddeming@xxxxxxx]

In a message dated 11/26/07 11:29:50 P.M. Eastern Standard Time,  
bartb@xxxxxxxxxxxxxxxx writes:

Hi  David,

Well, 50A is pretty high for a simple jacobs ladder. Putting the  element 
in a cool bath is a good idea. The pig isn't what will fry. In the  worst 
case scenario, the element will fail and remove the primary limiting  
device. In that case, the only limiting is the arc impedance itself. You  
would recognize this by a big change in the arc (brighter, hotter,  
faster). The breaker may not trip, so if you recognize any change, shut  
down the pig yourself.

Take care,
Bart


Hi Bart,
 
Aren't high power resistive elements usually high-R wire, possibly on  
ceramic form, and therefore fail open rather than short out?
 
Matt D.



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