1. Create Your User Profile and Status Updates

    Arc Flash Forum members are invited to create a user profile. Let others know who you are, what you do and even add a picture or avatar of yourself. What are you up to? Let people in the arc flash and electrical safety community know with "status updates"!
  2. Welcome to the All New Arc Flash Forum

    Arc Flash Forum is a community where we help each other learn about arc flash and electrical safety. There is still much to be learned about arc flash, standards, PPE, studies and more and We need your HELP!

    If you have good information about Arc Flash - Post It! If you have a question about Arc Flash - Post It! If you can provide answers to Arc Flash questions - Post it!

    Sign up as a today member! Feel free to link to this site www.arcflashforum.com. Tell your friends. We want to help everyone be safe in the workplace!
  3. Bigger and Better!

    As you have no doubt noticed, the forum has been through quite an upgraded and looks and feels very nice! There are loads of new features and ways in which this site can now be even more useful to the community in learning about Arc Flash and Electrical Safety.

    Create your detailed user profile
    Add a profile photo of yourself
    Like the forum on Facebook
    "Like" users' posts
    Publish your articles in the library
    ...and much, much more!

    Learn More About the New Features Here
Create Your User Profile and Status Updates Welcome Message Arc Flash Forum has been Upgraded!

Table 130.7(C)(9)(a)

Discussion in 'NFPA 70E - Standard for Electrical Safety in the W' started by raffle, Jan 4, 2008.

  1. raffle New Member

    I heard there is a good possibility in the next revision of NFPA, some of the tables might be removed.

    What is the possibility that the 600V Class Switchgear table will stay as is with notes 5 and 6 staying exactly as they are?

    I hate to be doing everything based on Table 130 and then find this table is fully altertered when the new version come out.

    Raffle
    raffle, Jan 4, 2008
    #1

  2. K. Jackson New Member

    In a copy of the 2008 ROP Report on Proposals that I have it looks like the table will be around for 2008. I could not imagine it going away. The Report on Comments are due in February with things being finalized in a few months. Footnote 5 is now 35 kA up to 0.5 Seconds. That corresponds with the the Tennative Interim Amendment that was in the 2004 version. Foot note 6 seems to disappear, there is just the note ROP 349 and then it is blank.
    K. Jackson, Jan 6, 2008
    #2

  3. raffle New Member

    If footnote 6 disappears, then we cannot reduce the hazard/ risk category by one of the short circuit current available is less than 25 kA.


    By the way, these tables appear to be much easier to use, so why are people spending so much time doing the IEEE method, especially when these tables will still be around? I am looking at this from the compliance perspective.
    raffle, Jan 7, 2008
    #3

  4. K. Jackson New Member

    That one stumped me too. All I saw was "ROP 349" where footnote's 6 text was. It would seem odd that reducing by 1 category for < 10kA would disappear. Does anyone else know the history of this?
    K. Jackson, Jan 7, 2008
    #4

Share This Page