IEEE 1584 & NFPA 70E
IEEE 1584 & NFPA 70E
(OP)
Is there any fundamental differences in the calculations for arc flash hazards between IEEE 1584 & NFPA 70E?
My understanding is that 1584 is the main document for arc flash hazard analysis and 70E puts those to use in tables for safety in the workplace.
The reason for my question is that I was shown some software programs where, for arc flash analysis, you could pick whether it is based on 1584 or 70E. I thought they were the same.
My understanding is that 1584 is the main document for arc flash hazard analysis and 70E puts those to use in tables for safety in the workplace.
The reason for my question is that I was shown some software programs where, for arc flash analysis, you could pick whether it is based on 1584 or 70E. I thought they were the same.






RE: IEEE 1584 & NFPA 70E
So the "NFPA 70E" equations in the software are probably based on the Lee equations, while the IEEE 1584 equations are obviously based on the IEEE standard.
But above 15 kV, IEEE 1584 I believe uses the Lee equations, so there should be no difference above 15 kV.
Cheers,
Dave
RE: IEEE 1584 & NFPA 70E
The 1584 equations are more complex, but in most cases I believe, more accurate.
They also both have different limitations as Dave pointed out.
RE: IEEE 1584 & NFPA 70E
IEE1584 is a simply one of several tools that can be used to comply with 70E.
RE: IEEE 1584 & NFPA 70E