Engineering Study

[bure961]

I have seen arc flash labels with the year 2012 on them using the 2009 70e code for the study . Would there be a cause for concern with this ? I would have though they would use the latest code. Anyone have an opinion about this. Thank you.

 

[zog]

Well they don't use the 70E for the study in most cases, they use IEEE 1584, which has not changed. Very minor changes from 2009 70E to 2012 70E, the only thing you should worry about updating is your companies safety program.

 

[kingpb]

And then the switching configuration or one-line changes and the whole study you had done means absolutely nothing.

To perform hot work again, you need to rerun the study; each time. Oh wait, I'll bet the engineer that gladly took your money forgot to tell you it as one off study (or he didn't even know) and you need the software and model to rerun it every time something changes.

But hey, you have a lot of nice pretty stickers (that are useless)

You get what you pay for.

 

[bure961]

After reading the information on the label again it is saying the arc flash hazards indicated are only valid based upon the associated afha modeled,, the date on this afh label and nfpa 70e - 2009 esp. this was done in 2012. Is it a problem that they used our 2009 esp ? How often do we have to bring up to date our esp ? Thank you.

 

[zog]

Your arc flash study is required to be updated anytime changes are made to the system that may affect the arc flash calculations (Adjusting or changing settings on an OCPD, adding or removing loads from the syetem, etc..). It should also be reviewed periodicly and at a minimum every 5 years.

Your questions do not make me worry about the study and what cycle was used, it makes me worry about your ESWP's and the level of training you recieved.

 

[gadfly56]

I have seen arc flash labels with the year 2012 on them using the 2009 70e code for the study . Would there be a cause for concern with this ? I would have though they would use the latest code. Anyone have an opinion about this. Thank you.

It's proper for the engineer to note which edition he used for the study so that others who follow later can be informed.

What edition of NFPA 70E has the AHJ in Framingham adopted, if any? If they are on 2009 then I wouldn't worry. If they moved to 2012 after the study, I still wouldn't worry. If the study was done after they adopted 2012, then I'd be concerned, maybe. If required, the engineer might be prevailed upon to write a letter and stamp it explaining why it isn't neccessary to re-run the calculations using 2012 as a framework.

If Framingham doesn't say "boo" about 70E at all, then I suppose whatever edition is handy for the engineer should work, especially if the changes from 2009 to 2012 are minor; I confess I'm not very familiar with 70E.