Developing and implementing an ongoing arc flash hazard program which meets the new regulations noted in NFPA 70E, IEEE-1584, and the current OSHA Standard 29 can be challenging. Rule of thumb methods could result in both unnecessary worker exposures to hazards from under protection and significant lost plant productivity due to overprotection.
Industry is recognizing the benefits of obtaining accurate arc flash hazard data. Recently, the PCIC Safety Committee recommended that arc flash calculations be completed in conjunction with short circuit calculations and protective device coordination to help ensure the most accurate arc flash hazard results. Using software that is able to deliver instantaneous, accurate results that are fully compliant with ANSI, NEC and NFPA 70E should be a vital part of every Arc Flash Hazard program. This could save companies thousands of dollars annually, per worker, in lost productivity.
However, performing a study and applying labels is only one aspect of a true arc flash hazard program. A comprehensive corporate electrical safety program also includes development and implementation of the proper processes, procedures, documentation, and training programs. It is important to develop a complete safety program.
Unfortunately, most engineers are under the misconception that if they label equipment for arc-flash hazards, and enforce the use of personal protective equipment (PPE) as per the label, they are in compliance with 70E (Z462) and OSHA requirements. Nothing could be further from the truth. Arc-flash hazard labeling and PPE compliance are only a small part of 70E (Z462) compliance and even a smaller part of a properly defined safety program.
Very few facility engineers appear to understand the thought process behind 70E (Z462) or the basis for the standards. If maintenance people are not informed why they must work within certain safety constraints, then the arc-flash label and PPE requirements become merely another task that can be sidestepped. Safety is a culture that must be ingrained with principal. This culture starts from management and filters down to the worker where ultimate responsibility rests.
The current arc-flash phenomenon appears to be operating on fear rather than principal. The fear is massive lawsuits and OSHA/governmental fines if an accident does occur, rather than sound reasoning as to why a safety culture makes good business sense in daily operations. While it may have taken some fear in the initial movement to motivate companies toward implementing safety standards, if the safety aspect of arc flash is limited to labeling and PPE requirements, the inclination will soon wear off.
Labeling or stating PPE requirements will not prevent accidents. Accidents are prevented and lives are saved through a foundation of safety.
Electrical arc flash hazard safety is not rocket science. By implementing the proper electrical software or arc flash software to model your electrical system, and building a culture of safety starting with management commitment and proper training, every facility can be accident free.
