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Hazard Risk Category 2*

Discussion in 'NFPA 70E - Standard for Electrical Safety in the W' started by Vica1ME, Apr 20, 2009.

  1. Vica1ME Junior Level

    Other than task and voltage level, are there further parameters which separates Hazard Risk 2 from 2*? For example incident energy levels, etc.?
    Vica1ME, Apr 20, 2009
    #1

  2. TxEngr Sparks Level

    TxEngr, Apr 21, 2009
    #2

  3. sthompson Junior Level

    the main difference is the PPE requirement Category 2* requires an arc-rated hood, where as Category 2 you can just use an arc-rated face shield.
    sthompson, Apr 24, 2009
    #3

  4. Don Jones Junior Level

    It looks like 2* goes away with the 2012 Edition of 70E. A bit of confusion is finally resolved by that one.
    Don Jones, Feb 20, 2011
    #4

  5. Vincent B. Sparks Level

    (See 70E-A2011-ROP.pdf)

    The 2* naming goes away, but the new requirements for HRC 2 will be those of the old 2* (arc-rated hood or arc-rated balaclava and faceshield now necessary in HRC 2, with a minimum arc rating of 8 cal/cm^2).

    Now that's confusion in progress, with all the labels in the field which will still call for HRC 2, or worse, labels with the PPE listed for HRC 2 at the time the label was affixed to the equipment.
    Vincent B., Feb 22, 2011
    #5

  6. brainfiller Administrator

    Behind the scenes it actually makes sense - it's just one more change to get used to and yes, short term confusion in the process. NFPA 70E requires parts of the body within the AF Boundary to be protected and there was a conflict in that Category 2 does not necessarily accomplish this since there could still be exposure to the back of the head. Category 2* did.

    The "New 2" attempts to resolve this conflict.
    brainfiller, Feb 22, 2011
    #6

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