Forensic Electrical Engineering Blog #3
Past – Present – Future 3-Blog Series By Jim Phillips, P.E. Blog #3: Evolution in Forensic Electrical Engineering There has been much advancement in the field of forensic electrical […]
Bus Duct and Arc Flash Hazard?
I was asked to evaluate some “newer” bus duct technology that are finger safe, use a turn and lock connection or similar methods without turning off the power. It seems […]
Global Use of IEEE 1584
The surface area of the earth is approximately 197 million square miles, and IEEE 1584—IEEE Guide for Performing Arc-Flash Hazard Calculations has been covering more of it every day since […]
NFPA 70E Major Updates for the 2012 Edition – Part 2.
Although beginning with an erratic schedule with revisions to NFPA 70E being spaced anywhere from 2 to 5 years apart, this very important electrical safety standard is now on a […]
Arc Flash Hazard Calculation Studies
In the earlier years of NFPA 70E and the emergence of arc flash protection requirements, many people would use the NFPA 70E Hazard/Risk Tables to determine what arc rated PPE […]
Coordination and NEC 240.87
NEC 240.87 has addressed a potentially hazardous situation beginning with the 2011 edition. When selective coordination is critical, e.g., minimizing the extent of an outage, a common design practice is to use […]