ARC-FLASH IEEE1584 VS 70E Code Requirement?

[Mike01]

If equipment is labeled for Arc-Flash with the Cal/cm^2, boundaries, and clothing what is the correct calculation to utilize, some associated in my company say that NFPA is required by code, my argument is what code requires to use NFPA over IEEE 1584? The code requirement is to label the panel if the owner wants to go the extra step and provide all the additional information, should 70E or 1584 be utilized, the code reference in a FPN 70E but nowhere does it say to use this standard? So if someone request 1584 is it in violation of the code?

 

[bsh]

use IEEE 1584 for the calculations.

 

[zog]

You are correct in your assumptions, the NEC dosent require the calcs, just the labels. The 70E allows for either 70E or 1584 methods to be used. 1584 equations are more omplex, more time consuming, and more accurate than the 70E method, use 1584 if you can.

 

[jim dungar]

... should 70E or 1584 be utilized, the code reference in a FPN 70E but nowhere does it say to use this standard? So if someone request 1584 is it in violation of the code?

The law is NFPA 70E, as applied by OSHA.

A tool to use to comply with the law is IEEE 1584. IEEE 1584 only provides the amount of arc flash incident energy (AFIE) in cal/cm? at various distances.

You need to use the results of a tool like IEEE 1584 as you implement NFPA 70E in creating an Electrical Safe Work Practices program.

 

[Mike01]

Preference

Preference

It sounds like the preference in this fourm is for IEEE1584 I know that NFPA 70E only covers 600V and below so for 15Kv I would assume that IEEE1584 would be used, I know that NFPA is more consertive therefore could be possibly overdressing and creating more of a hazard, however I am intrested in seeing the opinions of others on this issue why 1584 over 70E (or vice versa) in you opinions. Thanks in advance for your replies.