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Jim Phillips (brainfiller)
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Post subject: Device that defines the arc duration - Panelboards  Posted: Sun Dec 05, 2021 2:38 pm |
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Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1736
Location: Scottsdale, Arizona
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For panelboards, the next upstream protective device located in a separate enclosure is normally used to define the arc duration. This weeks' question:
Have you ever used a panelboards local main device to define its arc duration?
Yes
No
I don't perform studies
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jchristopherslice
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Post subject: Re: Device that defines the arc duration - Panelboards Posted: Mon Dec 06, 2021 8:30 am |
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Joined: Thu Jun 11, 2020 11:12 am
Posts: 3
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What is the correct procedure for evaluating the AFCT for the service panel when there's only one OCPD between it and the utility service entrance? What if it's a 3000A switchboard? Do you know how this should be handled in ETAP?
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aguywithfeet
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Post subject: Re: Device that defines the arc duration - Panelboards Posted: Tue Dec 28, 2021 10:09 am |
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Joined: Mon Mar 09, 2020 9:27 am
Posts: 31
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I have done this when the incoming wires were complete covered in a lexan shield inside an open cabinet style MCC. I don't believe now that it is correct, but i think realistically, it was ok.
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