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Thread: choosing correct ppe

  1. #1
    Join Date
    Jul 2005
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    192

    choosing correct ppe

    how would someone choose the PPE for 600a 480v panel? the panel needs to be turned off to install a 60a breaker for another piece of equipment. the equipment is older equipment with no labels.

  2. #2
    Join Date
    Oct 2015
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    US
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    Quote Originally Posted by mannyb View Post
    how would someone choose the PPE for 600a 480v panel? the panel needs to be turned off to install a 60a breaker for another piece of equipment. the equipment is older equipment with no labels.
    If the equipment is deenergised why the need for ppe

    Sent from my SM-G950U using Tapatalk

  3. #3
    Join Date
    May 2013
    Location
    Massachusetts
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    2,171
    Quote Originally Posted by nickelec View Post
    If the equipment is deenergised why the need for ppe

    Sent from my SM-G950U using Tapatalk
    One possible explanation is that there still may be energized capacitors on the load circuits, energizing the assumed-de-energized panel. And you'd need to voltmeter it first, before doing additional work.

  4. #4
    Join Date
    Mar 2013
    Location
    Rutland, VT, USA
    Posts
    239
    If you know the fault current at that panel and clearing time for the protective device protecting that panel, you can use the tables in NFPA 70E. Otherwise, you need a study.

    You need the proper PPE to test for de-energized since until it is tested dead, you have to assume it is live. You also need the proper PPE to remove the panel cover is this is being done prior to testing for dead.

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