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What is the largest calculated incident energy that you have seen?
Less than 50 cal/cm2
50 to 100 cal/cal2
100 to 250 cal/cm2
Greater than 250 cal/cm2
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 Post subject: Largest Incident Energy
PostPosted: Sun Jun 05, 2022 3:43 pm 
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Joined: Mon Sep 17, 2007 5:00 pm
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Location: Scottsdale, Arizona
As a follow up to the last question regarding the largest Arc Flash Boundary, this question is about the largest Incident Energy.

What is the largest calculated incident energy that you have seen?
Less than 50 cal/cm2
50 to 100 cal/cal2
100 to 250 cal/cm2
Greater than 250 cal/cm2


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 Post subject: Re: Largest Incident Energy
PostPosted: Sun Jun 05, 2022 4:20 pm 
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Joined: Mon Sep 17, 2007 5:00 pm
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Location: Scottsdale, Arizona
I saw a label years ago that was a bit above 1000 cal/cm2. Probably a case of "well that's what the software calculated" instead of knowing enough to question the result.


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 Post subject: Re: Largest Incident Energy
PostPosted: Sat Jun 11, 2022 5:59 am 
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Joined: Wed May 07, 2008 5:00 pm
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Location: Rutland, VT
I reviewed a report done by a firm for a company we were hired to do arc flash training for. They had a value of over 12,000 cal/cm^2 in a 115kV switchyard. I pointed out that this was absurd and that the wrong method had been used and that they had the working distance at 18 inches.

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