“Standard for Electrical Safety in the Workplace” (NFPA70E) was recently updated by the National Fire Protection Association (NPFA). It primarily addresses fire and explosion hazards caused by arc flash in electrical equipment. The ultimate goal of this initiative is to eliminate these events, thereby mitigating risk to facilities and—most importantly—injury to humans.
The U.S. Occupational Safety & Health Administration (OSHA) 29-CFR, part 1910.333, sub-part S (electrical) specifically addresses Standards for Work Practices and also references NFPA70E. The National Electric Code NEC 2005, article 409 (NEC409) was also amended to align with NFPA70E. Subsequently, in April of 2006, UL 508A SB was released as the guideline for panel fabricators to meet the requirements of NEC409. At the municipal, county and state levels, electrical codes are being amended at an increasing rate to include the requirement for short circuit current rating (SCCR) labeling of industrial control panels per NEC409.