It is currently Sat Jan 20, 2018 2:08 am

Post new topic Reply to topic
Author Message
ekstra   ara
 Post subject: NFPA 70E 2009 - Annex D questions
PostPosted: Tue Feb 24, 2009 7:21 am 
Sparks Level

Joined: Tue Feb 24, 2009 7:05 am
Posts: 252
Hi there,

I'm unable to use equations D.2(a) to (e) to calculate most of the flash protection boundary distance in table D.2.

For some lines of table D.2, my calculation does match, but for some others, it doesn't (and by some big margin).

Even in paragraph D.4 Sample Calculation, the result for flash protection boundary distance is not the same as the corresponding line in table D.2 (6.9/7.28 ft vs 9.7 ft).

Am I the only one finding this odd? Should table D.2 be corrected? Or should I use the other paragraphs (D.5, D.6, D.7, D.8) instead, or even one of the software performing that kind of calculation?


 Profile Send private message  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 7 hours

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
© 2017 Arcflash Forum / Brainfiller, Inc. | P.O. Box 12024 | Scottsdale, AZ 85267 USA | 800-874-8883