1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI C78.20-2003 (R2015)Electric Lamps A, G, PS, and Similar Shapes with E26 Medium Screw BasesANSI C78.20-2003 (R2007, R2015) American National Standard for Electric Lamps A, G, PS, and Similar Shapes with E26 Medium Screw Bases
2、 Secretariat: National Electrical Manufacturers Association Approved: January 21, 2015 American National Standards Institute, Inc. 2015 National Electrical Manufacturers Association NOTICE AND DISCLAIMER The information in this publication was considered technically sound by the consensus of persons
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4、d herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this publication. While NEMA administers the process to promote fairness in the devel
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12、15 National Electrical Manufacturers Association AMERICAN NATIONAL STANDARD Approval of an American National Standard requires verification by The American National Standards Institute, Inc. (ANSI) that the requirements for due process, consensus, and other criteria for approval have been met by the
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19、North 17th Street, Suite 900 Rosslyn, Virginia 22209 2015 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 Internati
20、onal and Pan American copyright conventions. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ANSI C78.20-2003 (R2007, R2015) Page ii 2015 National Ele
21、ctrical Manufacturers Association Foreword (This foreword is not part of ANSI C78.20-2003.) Suggestions for improvement of this standard should be submitted to: Secretariat C78 National Electrical Manufacturers Association 1300 North 17th Street, Suite 900 Rosslyn, Virginia 22209 This standard was p
22、rocessed and approved by Accredited Standards Committee on Electric Lamps, C78. Committee approval of the standard does not necessarily imply that all committee members voted for that approval. ANSI C78.20-2003 (R2007, R2015) Page iii 2015 National Electrical Manufacturers Association Contents Forew
23、ord . ii PART I General Information 1 1 Scope . 1 2 Normative References . 1 3 Definitions and Abbreviations . 2 4 Lamp Designations 3 5 Bulb Designations 3 6 Bulb Finish 3 7 Lamp Space Drawings . 3 8 Electrical Characteristics 4 9 Requirements . 4 10 Information for Luminaire Design . 4 11 Assessme
24、nt 5 12 Sampling 5 PART II Lamp Classes . 7 PART III Lamp Space Drawings 15 Annex A Qualifying Limit Tables . 37 Annex B Statistical Concepts and Basis of this Standard . 39 Annex C Bibliography . 40 Annex D Informative References 41 ANSI C78.20-2003 (R2007, R2015) Page iv 2015 National Electrical M
25、anufacturers Association ANSI C78.20-2003 (R2007, R2015) Page 1 2015 National Electrical Manufacturers Association PART I General Information 1 Scope This standard sets forth physical and electrical characteristics of the group of incandescent lamps that have A, G, PS, and similar bulb shapes with E
26、26 single and double contact medium screw bases including the reduced wattage versions. Only clear, inside frost, frost-equivalent, and white bulb finishes are acknowledged. Excluded from this standard are tungsten-halogen and projection lamps. Other groups of incandescent lamps are covered in the f
27、ollowing associated standards: ANSI C78.21-2003, American National Standard for Electric Lamps - Incandescent Lamps, PAR and R Shapes ANSI C78.22-1995, American National Standard for Electric Lamps - Incandescent Lamps, A, G, PS, and Similar Shapes with E39 Mogul Screw Bases ANSI C78.23-1995, Americ
28、an National Standard for Electric Lamps - Incandescent Lamps, Miscellaneous Types Many of the lamps covered by this standard do not relate to internationally standardized lamps that appear in International Electrotechnical Commission (IEC) standards. The subject lamps are not limited with regard to
29、design life as are those in IEC 60064, Tungsten Filament Lamps for Domestic and Similar General Lighting Purposes1. Their physical size may or may not comply with similarly rated IEC types. 2 Normative References The following standards contain provisions, which through reference in this text, const
30、itute provisions of this American National Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent edit
31、ions of the standards indicated below. ANSI C78.30-1997, Procedure for Use in Preparation of Incandescent Lamp Space Drawings ANSI/IEC C78.60360-2002, Standard Method of Measurement of Lamp Cap Temperature Rise ANSI C79.1-2002, Nomenclature for Glass Bulbs Intended for Use with Electric Lamps ANSI C
32、81.61-1990 (R1996), Electrical Lamp Bases ANSI C81.63-1991 (R1996), Gauges for Electrical Lamp Bases and Lampholders ANSI/IEC 60432:1-2002, Incandescent Lamps - Safety Specifications - Tungsten Filament Lamps for Domestic and Similar General Lighting Purposes - Part 1 IESNA LM-45-2000, IESNA Approve
33、d Method for Electrical and Photometric Measurements of General Service Incandescent Filament Lamps IESNA LM-54-1999, IESNA Guide to Lamp Seasoning ANSI C78.20-2003 (R2007, R2015) Page 2 2015 National Electrical Manufacturers Association 3 Definitions and Abbreviations In addition to bulb and base c
34、odes that are defined in the standards listed in Section 2, the following terms common to the industry are utilized in this standard. 3.1 MOL (Maximum Overall Length): Distance along the lamp axis from the base eyelet solder to the top of the bulb. 3.2 LCL (Light Center Length): Distance from the ba
35、se eyelet solder to the center of the light-emitting filament of the lamp which is sometimes needed for luminaire design. 3.3 Class: A grouping of like lamps having the same rated wattage, bulb shape, base, MOL, and bulb finish, including two or more voltage ratings within a voltage range. Each line
36、 item in Tables 1 and 2 is a class. 3.4 Voltage range: A series of rated voltages related to commonly available supply lines. Footnotes to Tables 1 and 2 list several common voltage ranges applying to classes of lamps in this standard. 3.5 Rated wattage: The wattage marked on the lamp. See IESNA LM-
37、45 for measurement of lamp wattage. 3.6 Rated voltage: The voltage marked on the lamp. If lamps are marked with a voltage range, it shall be interpreted that they are appropriate for use on any line voltage within that range. Consult manufacturers catalog to determine design voltage. 3.7 Base temper
38、ature rise: The surface temperature rise above ambient temperature of a standard test lampholder fitted to the lamp. Maximum base temperature rise limits apply to base-up burn position at which maximum rise occurs unless lamps are restricted to other burn positions by their manufacturers. See ANSI/I
39、EC C78.60360 for method of measurement. 3.8 Service: The field of most common application for a given lighting source. Service as used in this standard is not necessarily the only application. 3.9 Group: A grouping of lamps of the same rated wattage whose rated voltages fall within the same voltage
40、range (e.g.100 to 150V). 3.10 Type: Lamps identical in electrical and photometry ratings independent of base type. 3.11 Manufacturer: An organization making lamps within the scope of this standard at one or more nominated factories having a common quality management. 3.12 Production: The number of l
41、amps, within the scope of this standard, manufactured in a factory within a 12-month period. 3.13 Total production: The number of lamps, within the scope of this standard, manufactured in all the nominated factories of a single manufacturer within a 12 month period. 3.14 Whole production: The produc
42、tion of all types of lamps within the scope of this standard manufactured during a period of twelve months and named in a list by the manufacturer. 3.15 Inspection test quantity (I.T.Q.): The number of lamps to be tested with the intention of determining acceptability of the whole production as to d
43、imensional requirements. 3.16 Rating test quantity (R.T.Q.): The number of lamps to be tested with the intention of determining acceptability, of the whole production, as related to initial readings. ANSI C78.20-2003 (R2007, R2015) Page 3 2015 National Electrical Manufacturers Association 3.17 Initi
44、al readings: The electrical (wattage) measurements made at the end of the aging or seasoning period. 3.18 Test voltage: The rated voltage unless otherwise specified. If lamps are marked with a range voltage, the test voltage shall be taken as the mean of this range, unless otherwise specified. 3.19
45、Lumen maintenance: The ratio of luminous flux at 70% of rated life to the initial luminous flux, expressed as a percentage. 3.20 Qualifying limit (QL): The maximum of non-confirming lamps allowed within a given test quantity to establish compliance of the requirement being tested. 4 Lamp Designation
46、s This standard does not place any control over lamp designations. Incandescent lamps are generally designated by wattage, bulb type, and voltage ratings. The lamp manufacturer may apply additional codes. See the lamp manufacturers catalogs for detailed information. 5 Bulb Designations Bulb designat
47、ions used in this standard are defined in ANSI C79.1. Since the traditional eighth-inch sizes have long been utilized in some lamp designations, they are used in this standard. Their metric equivalents are shown in parentheses. 6 Bulb Finish Only lamps with clear, inside frost, frost-equivalent, or
48、translucent white bulb finishes are considered in this standard. However, it should not be interpreted that each of these finishes is available for each class listed in Part II. Silver bowl, enamel, transparent, and other special coatings are not covered by this standard. 7 Lamp Space Drawings For e
49、ach bulb, base, and MOL category, lamp space drawings in Part III of this standard show the maximum limits of the space that may be occupied by any part of the bulb. A typical bulb shape is shown, as a dashed line, within that maximum space. The space shown shall accommodate the longest and shortest lamps with maximum bowl and neck diameters, and maximum bulb eccentricity. These drawings were prepared according to the lamp space drawing procedures in ANSI C78.30. The f
