NFPA? 70E Standard for Electrical Safety in theWorkplace? 2021 nec NFPA
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Copyright 2020 National Fire Protection Asociation°. All Rights Reserved. NFPA 70E# Standard for Electrical Safetyin theWorkplace 2021 Edition Technical Committee on Electrical Safety in the Workplace and released by the Correlating This editin of NFPA O Stnl for Eletricl Sfty n t Workpi was prepared by the [ un uo o spres a q pns sm 1 apo enaa euoe o ano with an effective date of June 21 2020 and supersedes all previous editions. This edition of NFPA 70E was approved as an American National Standard on June 21 2020. Foreword to NFPA 70E The Standards Council of the National Fire Protection Association announced the formal appointment of a new electrical stanards development mitee on Janary 7 1976. The Committee on Electrical Safety Requirements for Employee Workplaces reported to the asociation through the Technical Correlating Committee on Natiomal Elertrical Codra (NEC°) The mittee was formed to assist OSHA in preparing an electrical safety standard that would serve OSHA's needs and that could be expeditiously promlgated through the provisions of Section 6(b) of the Oupational Safety and Health Act. OSHA found that in attempting to utilize the latest edition of the NEC it was confronted with the following problems: (1) OSHA could only adopt or modify a standard through procedures that prowide for public these proceures would require extensive effort and application of resources by OSHA and others. notice opportunity for public ment and public hearings. The adoption of a new NEC edition by Going through the proedures migh result in requirements substantially different fr those of the AEC thereby creating a conflict between the two standards. (2) The NECis intended for use primarily by thoe who design install and insect electrical installations. Most of the NEC requirements are not electrical safetyrelated work practices electrical system maintenance or directly related to employee safety: However OSHA electrical regulations which address employers and employees in their workplaces needed to consider and develop these safety areas. Ithecame aarent that a need existed for a new standard tailored to fulil OSHA's responsibilities that would still be fully consistent with the NEC. This led to the concept of a new document that would extract suitable portions from the NECand from other documents applicable Secretary of Lahor for OSHA who responded as follows: The concept procedures and scope of the to electrical safety. This concept and an offer of assistance was submitted in May 1975 to the Assistant effort discussed ith my staff for preparing the subject stanard appear to have great merit an n apparent need exists for this proposed consensus document which OSHA could consider for promulgation under the provisions of Section 5(b) of the Act. OSHA does have an interest in this effort and believes the proposed standard would sene a useful purpose. With this positive remenation that the NEC Corelaing Comitee examine the feasibility f developing a encouragement from OSHA the NFPA Electrical Section unanimously supported a document for evaluating electrical safety in the workplace. With remendations from the Electrical Section and Correlating Committee the Standards Council authorized the establishment of a mittee to carry out this examination. The mitte would develop a standard for electrical installations that would be patible with the OSHA requirements for employee safety in locations covered by the NEC The standard was visualized as consisting of four major parts: Part I Installtion Safety Requirements; Part II Safety Requirements for Special Equipment It was not considered essential for all of the parts to be Related Work Practices; Part II Safety-Related Maintenance Requirements; and Part IV Safety Buaq se pazulau sem d qe apeeae ap pu paqqn s pepus a aaaq paado 7E Std fElSf thWk PA til Prttit artd mrk t ail F Pt Association Quincy Massachusetts 02169.
ELECTRICAL SAFETY IN THE WORKPLACE an important aspect of electrical afety in the workplace bt the parts were sufficiently inependent of each other to pet their separate publication. Th first itin f NFPA OE Sndd for Eleil f Rqirmes fr Ee ors was published in 1979 and included only Part I Installation Safety Requirements. The second edition published in 1981 included a new Part II Safety-Related Work Practices. In 1983 the third edition added a new Part II Safety-Related Maintenance Requirements. In 1988 the fourth edition was published with only minor revisions. The 1995 edition included major revisions to Part I to conform to the 1993 edition of the NEC The concepts oflimits of approach’and establishment of anarc*were introuce in Part IL In 200 the sixth ediion included an upate ofPar Ito the 199 NEC as well as a new Part IV Safety Requirement for Special Equipment. Part I continued to focus on establishing flash protection bounaries and the use of personal protective equipment (PPE). Also charts were added to Part I to asist in applying appropriate protective clothing and peronal protetive equipment for mon tasks. The 2004 edition presented several significant changes. The major changes emphasized safe work practices. Clarity and usability of the document were also enhanced. The title was changed to Standard for Electrical Safrty in the Workplace The document was reformatted to ply with the Natiomal Electrical Code Seyle Menual. The existing parts were renamed as chapters foloed by safet-related maintenance requirements safety requirements for special equipment and safetyrelated installation and were reorganized with the safetyrelated work practices relocated to the front of the document to highlight the emphasis requirements. The chapter on afety-related work practices also was reorganized to emphasize that orking on lie parts is the last alternative work practice. An energized electrical work permit and related requirements were incorporated into the document. This standard is patible with the NECbut is not intended to be used or can it be used in lieu of the NEG Chapter 4 Specific Purpose Equipment and Installations was intended to serve a very specific need of OSHA. It was not intended to be applied asa design installtion modification or construction standard for an electrical installation or sstem. Its content was intentionall limited in parison to the NEC in order to apply to an electrical installation or a sstem as part of an employee's workplace. Chater 4 was updated to correlate with the 2002 edition of the NEC but requirements not directy associated with emloyee safety were not included. Omission of NECrequirements did not affct the NEG nor were oited requirements considered as unimportant. They are esential to the NEC and its intended application that is its use by those who desig install and inect lectrical installatin. NFPA 7OE on the other hand is intended for use by employs employees and OSHA. Requirements were upgraded throughout the 2009 edition. Chapter 4 was deleted hecause it was a dupliate of NEC installation requirements. Article 350 was added for R&D faciliies. Other changes included significant revisions to Annex D Annex F and Annex J and the adition of Annex M Annex N and Annex O. jo spau aes eaa a au o apa o panu pes s se uodm oue pau uoa iog a employers and employees. New research new technology and technical input from users proided the foundation for new and clarified requirements inclusion of technical material not previously coered and removal of requirements related to the safe o papuedxg saoedom aumo u saaiodua iq paaaunoua sprezeq pepapa at passauppe eq suataaba pastar installation of electrical equipment rather than being safe electrical work practices were some of the major actions undertaken during the revision cycle In adition requirements covering the separate but directly related concepts of hazard identification and risk assessment were revised to clarify the concepts. A significant revision to Annex F prmided extensive coverage of this topic toasist users with lementing fctivehzar idnifcatin nd rsk ement procures. nx P n aliging NFPA 70E implementation with occupational health and safety management standards was added. The majority of changes occurred in Chapter 1. Article 105 Application of Safet-Related Work Practices and a requirement for hearing protection when working within an arc flash boundary were added as were work practice requirements on the use of GFCls to protect employees. Clarification was made that Article 130 applies whether incident energy analsis or the hazardrisk table was used to determine use and level of PPE. Short-circuit current fault clearing time and ar flash bounary information were inclued in the hazardrisk category tables. Another major revision included changing “flame-resistant (FR)* to *arc-rated (AR)° in regard to PPE. The 2015 edition incorporated a major shift in how stakeholders evaluate electrical risk. In support of this new definitions for h hos ris and ris mwere addd to Article 10. Thrughout the documnt changes were mae to prwide clarity touers such as chaning yist rh e Thee lobal changesnsed cistet se of the risk. Other major revisions included the following: terms throughout the document and provided consistency between NFPA 7OE and other standards that adres hazards and (1) The definition of a qualified person was revised to correlate with the OSHA definition. (2) Safety-related maintenance requirements and other administrative controls were added to the scope statement to clarify that training and auditing are equally important safety-related work practices. (3) An electrical safety program must consider condition of maintenance. 70E2 ELECTRICAL. SAFETY IN THE WORKPLACE2021 Edition
NFPA 70E 2021 工作场所电气安全标准.pdf
