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arcflashprimero
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Post subject: Overduty Equipment  Posted: Thu Apr 09, 2026 6:22 am |
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Joined: Thu Dec 18, 2025 3:21 pm
Posts: 16
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I usually run my short circuit study using the ANSI standards and there are several over duty devices (about 20 devices). For arc flash, I run comprehensive method which results in only about 3 devices reported as over duty.
Would you only print the 3 over duty labels in comprenhsive or for this case would you run ansi arc flash? All equipment is 480 and 208V
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mpparent
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Post subject: Re: Overduty Equipment Posted: Thu Apr 09, 2026 6:25 am |
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Joined: Thu Apr 18, 2019 11:42 am
Posts: 173
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CB ratings are based on the ANSI standards...
Mike
PS Usually, the comprehensive and ANSI methods are pretty close. What is the margin of difference and can you give an example from your study of an overdutied device?
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arcflashprimero
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Post subject: Re: Overduty Equipment Posted: Thu Apr 09, 2026 7:30 am |
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Joined: Thu Dec 18, 2025 3:21 pm
Posts: 16
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Hmm, you are correct. It was a user error, apparently there were some errors when I ran the SC eval and comprehensive wasn't updating. They are both showing the same now, thanks for the response. I would delete this post if I knew how LOL
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