Arc Flash Boundaries in NFPA 70E (2018)

The latest edition of NFPA 70E has brought about significant changes to the way personal protective equipment (PPE) is selected and used to protect workers from arc flash hazards. One of the most notable changes is the introduction of four categories of PPE, each with a minimum Arc Rating value that must be met for required PPE.

Prior to this edition, NFPA 70E categorized hazards based on Hazard/Risk Categories, which were then used to determine the level of protection needed. However, the 2018 edition has replaced this system with one that is based on an incident energy analysis. This shift in approach has resulted in a more precise and effective method for determining the necessary PPE.

The four categories of PPE outlined in NFPA 70E (2018) are designed to provide workers with the appropriate level of protection against arc flash hazards, depending on the specific work being performed. Each category includes a minimum Arc Rating value that must be met by the required PPE. Employers are responsible for ensuring that their employees have access to adequate PPE for the job at hand.

The 2018 edition of NFPA 70E also eliminated the option for workers to wear non-FR/AR natural fiber garments in HRC 0, further emphasizing the importance of using flame resistant and arc rated clothing.

In order to determine which PPE is necessary for a particular job, employers must conduct an incident energy analysis. This involves calculating the amount of energy that would be released by an arc flash event and then selecting PPE that can withstand that level of energy. The 2018 edition of NFPA 70E provides tables and guidance to help employers complete this analysis and select the appropriate PPE.

By following the guidelines outlined in NFPA 70E (2018), employers can provide their employees with the necessary protection against arc flash hazards, helping to prevent life-changing injuries and fatalities. Whether it's fall protection equipment, respiratory protection, or flame resistant and arc rated clothing, providing adequate PPE is crucial for ensuring worker safety.

In conclusion, understanding the four categories of PPE outlined in NFPA 70E (2018) is essential for employers looking to provide their employees with the necessary protection against arc flash hazards. By selecting PPE that meets the minimum Arc Rating values for each category and conducting an incident energy analysis, employers can ensure that their workers are adequately protected and safe on the job site.

Arc flash boundaries 2018