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| Device that defines the arc duration - Panelboards https://brainfiller.com/arcflashforum/viewtopic.php?f=33&t=5529 |
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| Author: | Jim Phillips (brainfiller) [ Sun Dec 05, 2021 2:38 pm ] |
| Post subject: | Device that defines the arc duration - Panelboards |
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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| Author: | jchristopherslice [ Mon Dec 06, 2021 8:30 am ] |
| Post subject: | Re: Device that defines the arc duration - Panelboards |
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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| Author: | aguywithfeet [ Tue Dec 28, 2021 10:09 am ] |
| Post subject: | Re: Device that defines the arc duration - Panelboards |
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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