If you are involved with electrical work you need to check out the arcadvisor.com blog at http://arcadvisor.blogspot.com/
It focuses exclusively on arc flash, its dangers, prevention, etc… Additionally, they’ve got a free beta version of an arc flash calculation software that you can download free in exchange for feedback.
Arcad, the company that provides this blog and free software “helps facilities create safer working environments for individuals who service electrical systems by providing On-Line and PC based software tools for Short Circuit and Arc Flash Hazard Analysis. NFPA requires that any panel likely to be serviced by a worker be surveyed and labeled. ARCAD service includes resources and tools allowing plant and facility managers and personnel to perform short circuit, incident energy, arc flash protection boundary, level of PPE calculations, and create customized arc flash warning labels themselves drastically reducing the cost of getting in compliance with OSHA & NFPA 70E”
Have a look around (It’s a Canadian company but the information applies here in the U.S. as well), and download the free software. Don’t forget to go back and give them feedback, it’s the least you can do to thank them for the free download.