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31、 be viewed at no cost at www.nfpa.org/docinfo.791-1 NFPA and National Fire Protection Association are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts 02169. Copyright 2017 National Fire Protection Association . All Rights Reserved. NFPA 791 Recommended Practi
32、ce and Procedures for Unlabeled Electrical Equipment Evaluation 2018 Edition This edition of NFPA 791, Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation, was prepared by the Technical Committee on Electrical Equipment Evaluation and released by the Correlating Committ
33、ee on National Electrical Code . It was issued by the Standards Council on August 1, 2017, with an effective date of August 21, 2017, and supersedes all previous editions. This edition of NFPA 791 was approved as an American National Standard on August 21, 2017. Origin and Development of NFPA 791 Th
34、e Technical Committee on Electrical Equipment Evaluation was organized in 2008 by NFPA in recognition of the need for requirements for the qualications and competency of third parties performing eld evaluations on electrical products and assemblies and to guide the process for eld evaluations. One m
35、eans to demonstrate conformance of products to an applicable product safety standard is through certication. Historically, certication was accomplished through a laboratory investigation of a prototype or initial sample to determine compliance with the standard, with a system of ongoing follow-up in
36、spections conducted to continue certication. The result was a “Certication,” “Listing,” “Recognition,” or “Classication” of the product dened by various standards, including NFPA 70 , National Electrical Code . These processes were formalized in several international standards, including ISO/IEC Gui
37、de 65, General Requirements for Bodies Operating Product Certication Systems, and ISO/IEC Standard 17020, General Criteria for the Operation of Various Types of Bodies Performing Inspection. As the marketplace evolved, more and more products needed to be evaluated differently from the above system b
38、ecause they were already installed at the installation site. Another condition that did not t the normal process and required some other process of evaluation was that some products needed to be evaluated but were not produced in quantities that t the traditional certication model economically. The
39、alternative process to meet the needs for evaluation of unique, modied, or other equipment beyond the manufacturing process became known as a “eld evaluation.” The process used for eld evaluations, by the nature of the work, is a blend of ISO/IEC Guide 65 and ISO/IEC Standard 17020. In 2008, a task
40、group identied the need to create two documents covering the performance of eld evaluations of electrical equipment and used the following document as the basis for development: Recommended Competency Guidelines for Third Party Field Evaluation Bodies, which was developed by the American Council for
41、 Electrical Safety (ACES), a division of the American Council of Independent Laboratories (ACIL) (rst edition, November 17, 2005). The ACES document provided guidelines regarding the competency of rms that perform eld evaluations. NFPA 791 and its companion document, NFPA 790, Standard for Competenc
42、y of Third-Party Evaluation Bodies, provide their users with the ability to qualify who can complete eld evaluations and how eld evaluations specically for electrical products are to be completed. No changes were made to the 2014 edition of NFPA 791 other than updating the reference of NFPA 70 , Nat
43、ional Electrical Code , from the 2011 edition to the 2014 edition. There are only a few changes that are included in 2018 edition of NFPA 791. The edition date for NFPA 70 , National Electrical Code , is updated in Chapter 2 and the reafrmed date for ASQ Z1.4, Sampling Procedures and Tables for Insp
44、ection by Attributes, in Annex C is included. Edits are made to 1.1.1 and 1.2.4 to correctly refer to applicable nationally recognized standard(s) and to clarify the purpose of the document. Edits are made in Sections 5.8 and 5.11 relative to overcurrent protection and marking for fuses and replacem
45、ent elements.UNLABELED ELECTRICAL EQUIPMENT EVALUATION 791-2 2018 Edition Correlating Committee on National Electrical Code Michael J. Johnston, Chair National Electrical Contractors Association, MD IM Mark W. Earley, Administrative Secretary National Fire Protection Association, MA James E. Brunsse
46、n, Telcordia Technologies (Ericsson), NJ UT Rep. Alliance for Telecommunications Industry Solutions Kevin L. Dressman, U.S. Department of Energy, MD U Palmer L. Hickman, Electrical Training Alliance, MD L Rep. International Brotherhood of Electrical Workers David L. Hittinger, Independent Electrical
47、 Contractors of Greater Cincinnati, OH IM Rep. Independent Electrical Contractors, Inc. Richard A. Holub, The DuPont Company, Inc., DE U Rep. American Chemistry Council John R. Kovacik, UL LLC, IL RT Alan Manche, Schneider Electric, KY M James F. Pierce, Intertek Testing Services, OR RT Vincent J. S
48、aporita, Eatons Bussmann Business, MO M Rep. National Electrical Manufacturers Association Alternates Lawrence S. Ayer, Biz Com Electric, Inc., OH IM (Alt. to David L. Hittinger) Roland E. Deike, Jr., CenterPoint Energy, Inc., TX UT (Voting Alt. Electric Light & Power Group/EEI) James T. Dollard, Jr
49、., IBEW Local Union 98, PA L (Alt. to Palmer L. Hickman) Stanley J. Folz, Morse Electric Company, NV IM (Alt. to Michael J. Johnston) Ernest J. Gallo, Telcordia Technologies (Ericsson), NJ UT (Alt. to James E. Brunssen) Robert A. McCullough, Tuckerton, NJ E (Voting Alt. International Association of Electrical Inspectors) Mark C. Ode, UL LLC, AZ RT (Alt. to John R. Kovacik) Christine T. Porter, Intertek Testing Services, WA RT (Alt. to James F. Pierce) George A. Straniero, AFC Cable Sys
