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ekstra   ara
 Post subject: Fault Current
PostPosted: Tue Apr 14, 2015 9:18 am 

Joined: Tue Feb 17, 2009 11:04 am
Posts: 37
I'm wondering if there's any data available that indicates the necessary available fault current, on a 277V system, to blow a hole through the sheathing of a MC cable (#12 awg, 3 conductor).



Assume worst-case - a bolted fault either between phase/ground or phase/sheathing.



If I know that necessary available fault current, I could then conduct a fault current analysis for my particular situation to determine if there's even sufficient current for that to hypothetically occur.


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 Post subject: Re: Fault Current
PostPosted: Wed Apr 15, 2015 7:52 pm 
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Joined: Tue Oct 26, 2010 9:08 am
Posts: 2174
Location: North Carolina
There are formulas for metal damage but gas pressure will open it up before it melts through.


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