Abstract: Though electrical incidents represent a relatively small percentage of all work-related incidents, they are disproportionately fatal. In the case of burn injury, it may result in extended hospitalization and rehabilitation. Proper protection is the key to reduce casualties during these incidents. IEEE 1584 and NFPA 70E are developed to protect the safety of workers. For a better understanding of the arc flash phenomena, the IEEE and the NFPA (National Fire Protection Association) have joined forces on an initiative to fund and support research and testing to improve the understanding of arc flashes. The results of this collaborative project will provide information that will be used to improve electrical safety standards, predict the hazards associated with arcing faults and accompanying arc blasts, and provide practical safeguards for employees in the workplace. The identified areas include but are not limited to 1) Heat and Thermal Effects, 2) Blast Pressure, 3) Sound and 4) Light intensity. This presentation will cover the heat and thermal-related arc flash hazards. It will give an introduction to the newly released IEEE Std. 1584–2018, IEEE Guide for Performing Arc-Flash Hazard Calculations. Speaker(s): Wei-Jen Lee, Ph.D., PE, Virtual: https://events.vtools.ieee.org/m/282637