NFPA 70E-2003
This Excel file combines arc flash equations from a proposal to NFPA 70E with simplified equations to calculate available fault current. This tool uses methods that have been shown to result in conservative estimates of fault current, which should result in conservative estimates of arc incident energy if appropriate arc fault clearing times are used.
An IEEE 1584 equation is used to calculate arcing fault current. That is the fault current value that is used to determine the clearing time of the overcurrent protective device ahead of the potential arc fault location. Electrical engineering should be consulted to obtain information on fault clearing times.
Arc flash calculation is not an exact science and caution is always necessary, including use of multiple alternate methods that are available to verify results and ensure the highest level of safety based on the best information available.
According to the NFPA 70E Technical Committee on Electrical Safety Requirements for Employee Workplaces, This proposal presents the best information available to date on arc fault hazards. Public review and comments are strongly encouraged. Recent testing has enabled development of improved equations for calculating the arc flash incident energy at the arc flash boundary. While the testing and development of methods is not complete this proposal contains methods that reflect significantly more laboratory data than the existing methods and will allow improved safety.
This calculator is for use only with systems operating at less than 1000 volts. If any doubts exist on use of this spreadsheet, or to perform a flash hazard analysis on systems operating at more than 1000 volts, consult with an electrical engineer or other knowledgeable person.
| Software: | Short Circuit And Arc Flash Calculator |
| Version: | – |
| Developer: | Hanford |
| Size: | 1.8MB |
| Price: | Free |
| Download: | Right here | Video Courses | Membership | Download Updates |
Would you mind having the software in google sheet format too?
Download link is fixed, finally! I apologize for the inconvenience.
Link is still not working
Dear Admin,
Would highly appreciate it if you could provide another download link or advise how to proceed, as I could not download the Electrical Safety Program & Arc Flash Calculator, despite being Logged-In at Box.com.
Regards and more power to you…
Were you able to download this spread sheet? Can you please share a link without signing up any accounts? Thanks
I really need this spreadsheet but can’t download it – issues with Box of which I’m already a user.
Please advise or provide a different source.
Thank you for this awesome website and all the software tools. Really appreciated.
still not loading for me Its asking me to setup a box account – thanks.
Is there a direct link to download arc flash? Its asking me to setup a box account. Please help, thanks.
I don’t really trust “simplified equations” approach in calculating available fault currents. They are usually producing highly inaccurate “conservative” estimates of fault current that do not necessarily result in conservative estimate of incident energy. It also remains a mystery how appropriate arc fault clearing times can be chosen based on “conservative” estimates of fault current. Consider Short Circuit Analytic (SCA) software capable of calculating accurate available fault currents from one source in its free trial version, and from multiple in commercial version. More information at http://arcadvisor.com/short-circuit-software
Where can we buy the short circuit flash calculator?
Would be nice to see a metric version for use with metric dimensions and SI units.
I try to download an application but it says to login first. I login in but then cannot get back to the download page because I’m on another website you have directed me to. A nice Catch-22.
Try now. There was some modifications in portal. Please let me know if you still have problems with downloading.
its not working, i need this spread sir
i need a software for Earthing…. could you suggest any?
Maybe we’ll add some software for it in near future.
BR
I am studyng a master on electrical engineer, and the information shown very useful and interesant.
Thanks Diego! Hope you found what you were looking for!