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Thread: STRENGTH OF PANEL COVER IN RELATION TO ARC BLAST

  1. #1
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    STRENGTH OF PANEL COVER IN RELATION TO ARC BLAST

    What is the strength of Panel board cover, switchboard cover in accordance with Arc Blast? Do you have a table of the Cover Strenght in relation with the thickness of the metal?

  2. #2
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    If the gear in question is not listed as Arc Resistant, it's irrelevant in that the cover is not actually required to remain intact in an arc blast event. There are no standards other than those for Arc Resistant Equipment that address this one way or the other. From an electrical and arc flash safe work practices standpoint in NFPA 70E, you are not actually required to use PPE or other protective measures if the enclosure is closed, even though there is no guarantee that it will not come apart in an arc blast event because the risk of that is considered low.

    If the gear is listed as Arc Resistant, the thickness of the metal is whatever it takes to withstand the forces of the available incident energy it is rated for. Manufacturers attain that with a number of strategies involving forming and bracing, not just metal thickness alone. Certification is attained only by destructive witnessed testing at qualified facilities.
    __________________________________________________ ____________________________
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  3. #3
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    I'm sure how strong they are, but I will usually shield myself with the panel door when I flip on a breaker.

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    It's an interesting thought......i guess i'll be more aware of missing screws now ~RJ~

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