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Thread: 24 vdc control - 480 vac power single enclosure -work in control side while energized

  1. #11
    Join Date
    Aug 2004
    Location
    Northern illinois
    Posts
    15,650
    I think the question that has to be asked is if there is a risk of arc flash from working in another cabinet how is that any different than the risk of arc flash just from walking in front of the cabinet? The cabinet does not contain the arc flash anyway so any openings between the cabinets are not especially significant.
    Bob

  2. #12
    Join Date
    Oct 2017
    Location
    Pittsburgh, PA, USA
    Posts
    2
    I too would be interested in further discussion on this point. I am faced with a similar request of a customer and need to determine a safe solution that meets any relevant codes. I have the same basic opinion as jreaf, that a simple divider just would not protect from a potential blast. Regardless of the cause, dropped tool, cross wire, dust kicked up by a draft, an arc flash in the unprotected face of an unsuspecting electrician will surely work it's way through the easiest path to escape.

    The question is then, what is safe enough?

    Sent from my SAMSUNG-SM-G930A using Tapatalk

  3. #13
    Join Date
    Feb 2003
    Posts
    142
    Look into Hoffman’s sequestor line of enclosures. That be an option.

  4. #14
    Join Date
    Oct 2017
    Location
    Pittsburgh, PA, USA
    Posts
    2
    Quote Originally Posted by wireman View Post
    Look into Hoffman’s sequestor line of enclosures. That be an option.
    Thanks for the reply wireman, but I am really hoping to answer the question of safety in keeping to the original posters question and separation inside of a single cabinet. I did review your suggestion and the ones earlier and neither will work well in my situation.

    I am trying to focus on this because of my customers push for a separation and my bosses acceptance of that solution. I would like to refute their decision with some code examples that they can't argue against. Right now they are just looking at the dollars which is a poor deciding factor.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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