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Cross-References, IEC 60364 to NEC, of This Report

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Cross-References, IEC 60364 to NEC, of This Report ELECTRICAL INSTALLATION REQUIREMENTS A Global Perspective National Electrical Manufacturers Association By Underwriters Laboratories Inc. Principal Investigator: Paul Duks April 1999 © Copyright 1999 by the National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. Ó NEMA® Ó NEMA® A GLOBAL PERSPECTIVE NOTICE Disclaimers and Limitation on Liability The contents of this document, including, without limitation, the informational content and data (the “contents”) are provided AS IS, and NEMAÔ makes no representations or warranties, express or implied, of any kind with respect to this document or its contents. NEMA disclaims all representations and warranties including, without limitation, warranties of merchantability, fitness for a particular purpose or use, and non- infringement. In preparing this document, NEMA has endeavored to provide current content as of the date it was prepared. NEMA does not represent or warrant that the content is current at the time the user reads the document or that it will remain current. Nor does NEMA represent or warrant that this document is free from typographical or other errors or that it contains all the information a reader needs to consider for its particular purpose, since NEMA does not know to what use this document or its contents is contemplated. NEMA reserves the right to add to, change, or delete the contents of this document, or any part thereof, without notice. Any price or availability information with respect to this document is also subject to change without notice. The user agrees that neither NEMA nor any governors, officers, employees, or other representatives of NEMA will be liable for damages arising out of or in connection with the use of this document or its contents, and the user agrees to indemnify and hold harmless NEMA, its governors, officers, employees, and other representatives of and from any and all liability, damages, losses, claims, or judgments arising out of the use or misuse of this document and its contents, or the failure to consider other information along with this document and its contents. Ó NEMA® i ELECTRICAL INSTALLATION REQUIREMENTS ii Ó NEMA® A GLOBAL PERSPECTIVE TABLE OF CONTENTS Foreword.............................................................................................................................................................v Acronyms and Electrical Circuit Designations ............................................................................................vi Executive Summary...........................................................................................................................................1 Introduction........................................................................................................................................................2 Overall Assessment............................................................................................................................................3 Suitability for Adoption ....................................................................................................................................7 Effect of Normative References .....................................................................................................................8 Assessment of Style and Attributes ................................................................................................................9 Comparison of Significant Provisions, NEC to IEC 60364 .....................................................................14 Cross References, IEC 60364 to NEC.........................................................................................................48 Annex A-1, Layout and Arrangement of the NEC....................................................................................64 Annex A-2, Numbering System and Plan of IEC 60364 ..........................................................................65 Annex B-1, Normative References in IEC 60364 ......................................................................................68 Annex B-2, U.S. Product Requirements Corresponding to Normative References in IEC 60364 Documents...............................................................................75 Annex C, Excerpts from ISO/IEC Directives, Part 3 ..............................................................................79 Annex D, Example Circuits ...........................................................................................................................82 Annex E, Comparison of Conductor Ampacities......................................................................................89 Annex F, Fuse and Circuit Breaker Characteristics....................................................................................91 Index..................................................................................................................................................................95 Ó NEMA® iii ELECTRICAL INSTALLATION REQUIREMENTS iv Ó NEMA® A GLOBAL PERSPECTIVE FOREWORD This study was undertaken as part of the NEMA Global Strategy Initiative. Increased sales and use of electrical products in markets around the globe make it imperative that manufacturers, codes and standards developers, and conformance assessment organizations have a clear understanding of the electrical installation systems in which electrical products are being used. The intent of this document is to foster a better understanding of the similarities and differences between the National Fire Protection Association's NFPA 70, National Electrical Code,® and the wiring rules promulgated by IEC 60364, Electrical Installations for Buildings. These two prominent documents collectively serve as the basis for electrical wiring used in over 90 percent of the world. The extensive document comparison and analysis in this report was conducted by Underwriters Laboratories under contract to NEMA. Funders include NEMA, NIST, NFPA, and UL. The IEC covered the expenses of David Latimer, IEC TC64 Chairman. The effort was reviewed and critiqued periodically during the process by a Peer Review Committee convened expressly for this task. The professional standing of committee members made them particularly well suited for this assignment. Committee members included Paul Duks, Underwriters Laboratory; Mark Earley, NFPA; Ken Gettman, NEMA; David Latimer, IEC TC64 Chairman; Francois Martzloff, NIST; John Minick, NEMA; Bob McCullough, IAEI, Ocean County Construction Inspection Department; George Ockuly, Cooper Bussmann; Jim Pauley, Schneider Electric; Jack Wells, Pass & Seymour Legrand; and John Young, Siemens. This report reflects the contributions of committee members, all of whom believed in the important implications that the analysis will have for the electroindustry here and abroad. David Latimer offers the following insights into the work of the committee: “I have been pleased to take part in the peer review group that assisted in the preparation of this report; my contribution has been to further the understanding of IEC 60364.” “The reference in the Assessment of Style Attributes section to IEC 60364 as not being intended as a document for use by engineers and electricians is mine. Almost all countries that have adopted IEC 60364 as the basis for national standards provide guidance either produced by themselves or another country, but not all.” “The guidance can be divided into two classes, one of which is broad guidance, expanding upon the principle, and for the assistance of the senior designer engaged in large or difficult installations. The other is 'do it this way' guidance. The NEC is a 'do it this way' document. It has a broad scope and covers the widest possible range of situations. I believe that installations carried out to the NEC will comply with the requirements of IEC 60364. Without doubt, they comply with Chapter 13.” “I do not believe that the NEC is suited to be, nor could it become, an international standard. What it is suited for and could be declared to be is a way of making an installation which complies with IEC 60364 when using equipment listed in UL or U.S. standards.” “The point is made in the report that because of the limited experience of national committees and delegates to TC 64 in 110 volt systems, the requirements of IEC 60364 do not fully reflect the needs of such systems. This may possibly be so. I would welcome an indication of the way in which IEC 60364 might be amended to meet these needs, thus enabling IEC 60364 to be adopted by ANSI as a U.S. standard, with the NEC as a 'means to comply' document for those countries that wish to use it.” The work summarized in this report is the beginning of a more extensive effort by NEMA member companies. NEMA product technical sections are planning to use this report as a reference document and a roadmap to improve their understanding of the commercial applicability of their products in the installed electrical infrastructure in target countries or regions utilizing the wiring principles of IEC 60364. Some NEMA sections may choose to simply take note of the differences between the two subject wiring approaches; others will pursue a strategy to make changes in one or both code documents in an attempt to broaden the market applicability of
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