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Always check the arc flash rating sticker

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    Always check the arc flash rating sticker

    Always check the arc flash rating sticker located on the equipment to determine proper PPE needed to open, inspect, or work on equipment. If there isn't an arc flash rating sticker assigned to that equipment; the technician should refer to NFPA 70E before moving forward.

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    Quote Originally Posted by romeroduke View Post
    Always check the arc flash rating sticker located on the equipment to determine proper PPE needed to open, inspect, or work on equipment. If there isn't an arc flash rating sticker assigned to that equipment; the technician should refer to NFPA 70E before moving forward.
    What do you guys do when you find a label that says "Dangerous! No Safe PPE exists"?

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    Jrmcritical is offline
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    Quote Originally Posted by samair99 View Post
    What do you guys do when you find a label that says "Dangerous! No Safe PPE exists"?
    Funny you bring that up. A particular hospital that we do work for in NYC does not allow that signage or verbiage and will actually remove the pages from their arc flash analysis when this condition exists (which is quite common, as the utility coming in in manhattan contributes around 200kA of fault current.

    It was explained to me that by posting the "Dangerous! No Safe PPE exists" labels they cannot allow their in-house or any contracted electrician to operate a switch on that board. By removing that label, the person operating the switch is responsible for determining the appropriate PPE levels.

    This brings up a newly arising issue. With the availability of 200kAIC rated circuit breakers, much more distribution will be subject to higher fault currents. With the insane cost of real estate in NYC, many sites are moving away from switch and fuse and going with breakers. By doing this they can significantly reduce the footprint of some switchboards.

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    Quote Originally Posted by samair99 View Post
    What do you guys do when you find a label that says "Dangerous! No Safe PPE exists"?
    Explain to the customer that we are not allowed to open that while its live. If they want us to IR scan it they should install IR windows.

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    No Safe PPE

    Quote Originally Posted by samair99 View Post
    What do you guys do when you find a label that says "Dangerous! No Safe PPE exists"?
    We will note the equipment I.D. and calorie level and notify customer that we cannot safely access that equipment without de-energizing it. Recommend to the customer to consider upgrading the current protection of that circuit in order to reduce fault clearing time which will reduce calorie level.

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    NFPA 7070E

    Quote Originally Posted by Jrmcritical View Post
    Funny you bring that up. A particular hospital that we do work for in NYC does not allow that signage or verbiage and will actually remove the pages from their arc flash analysis when this condition exists (which is quite common, as the utility coming in in manhattan contributes around 200kA of fault current.

    It was explained to me that by posting the "Dangerous! No Safe PPE exists" labels they cannot allow their in-house or any contracted electrician to operate a switch on that board. By removing that label, the person operating the switch is responsible for determining the appropriate PPE levels.

    This brings up a newly arising issue. With the availability of 200kAIC rated circuit breakers, much more distribution will be subject to higher fault currents. With the insane cost of real estate in NYC, many sites are moving away from switch and fuse and going with breakers. By doing this they can significantly reduce the footprint of some switchboards.


    Someone needs to inform this customer of the standards, if they take that stance and someone gets hurt, they are liable!They are required to provide accurate information for service personnel, they cannot allow service personnel to guess.
    (D) Equipment Labeling. Electrical equipment such as
    switchboards, panelboards, industrial control panels, meter
    socket enclosures, and motor control centers that are in
    other than dwelling units and that are likely to require ex-
    amination, adjustment, servicing, or maintenance while en-
    ergized shall be field-marked with a label containing all the
    following information:
    (1) Nominal system voltage
    (2) Arc flash boundary
    (3) At least one of the following:
    a. Available incident energy and the corresponding
    working distance, or the arc flash PPE category in
    Table 130.7(C)(15)(A)(b) or Table 130.7(C)(15)(B)
    for the equipment, but not both
    b. Minimum arc rating of clothing
    c. Site-specific level of PPE

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