1、 ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 American National Standard Incandescent lamps: PAR and R Shapes ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 1 of 53 American National Standard Appro
2、ved: August 9, 2011 Secretariat: American National Standard Lighting Group Incandescent lamps: PAR and R Shapes ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 2 of 53 American National Standard Approval of an American Nati
3、onal Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. An American National Standard implies a consensus of those substantially concerned with its scope and provisions. Consensus is estab
4、lished when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly, and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be
5、considered, and that a concerted effort be made toward their resolution. The existence of an American National Standard does not in any respect preclude anyone, whether he has approved the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not con
6、forming to the standards. It is intended as a guide to aid the manufacturer, the consumer, and the general public. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall hav
7、e the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for interpretations should be addressed to the secretariat or sponsor whose name appears on this title page. CAUTION NOTICE: This American National
8、Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken periodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by callin
9、g or writing the American National Standards Institute. 2011 by American National Standard Lighting Group All rights reserved. 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
10、United States of America ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 3 of 53 Table of Contents Foreword. 4 Part I General Information 5 1 Scope 5 2 Normative References 5 3 Definitions and abbreviations. 6 4 Lamp design
11、ations 7 5 Bulb designations 7 6 Bulb finish. 8 7 Beam photometry and classification. 8 8 Lamp drawings. 8 9 Electrical characteristics. 9 10 Requirements. 9 11 Information on luminaire design. 10 Part II Lamp Classes 13 Table 1 Standard Lamp Classes with PAR and R Bulbs. 15 Part III Lamp Space Draw
12、ings. 23 Part IV Product Drawings. 43 Annexes. 50 Annex A Informative References 52 ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 4 of 53 Foreword (This foreword is not part of American National Standard C78.21-2011.) Sug
13、gestions for improvement of this standard should be submitted to the Secretariat C78 American National Standard Lighting Group, 1300 North 17th Street, Suite 1752, Rosslyn, VA 22209. This standard was processed and approved by the Accredited Standards Committee on Electric Lamps, C78, and its Work G
14、roup 78WG01. Committee approval of the standard does not necessarily imply that all committee members voted for that approval. For the readers convenience, redline markings are provided for those items that have changed since the last edition of this standard. As an example (but not limited to this)
15、, new electrical requirements have been added, i.e. Section 10.5, and others not listed here. Substantial changes have been added to Table 1 as wellspecifically, additions of the new bulb and base types. The reader should refer to Part III Lamp Space Drawings to see technical and editorial changes m
16、ade to many of the figures. Figure C78.21-250 is a new drawing for the PAR38 (PAR121) G12.7 Medium Side Prong Base. Amendment / Change CDV RV Revision and Consolidation CDV 78_4287 RV 78_4288 Andy Jackson, Chair, C78 Jaime Huizar, Technical Coordinator Randolph N. Roy, ANSLG Secretariat Matt Clark,
17、Senior Editor ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 5 of 53 PART I General Information 1 Scope This standard provides physical and electrical characteristics of the group of incandescent lamps that have PAR and R
18、bulb shapes. Lamps with clear, frosted, and lens end bulbs, with clear and prescription lenses, and with various reflector coatings are covered. Lamps covered in this standard may contain either of two basic types of light sources; an incandescent filament or a tungsten halogen inner bulb. Sunlamps
19、and heat lamps of the R type are included. Lamps with discharge arc tubes are not included. Other groups of incandescent lamp standards are affected by this revision. Please see the normative paragraph below referencing 78.20, 78.22, and 78.23. At the time of issuance of this standard there was no c
20、omparable standard published by the International Electrotechnical Commission (IEC). 1.1 Important Patent Disclaimer It is possible that some of the elements of this document may be the subject of patent rights. When this document was approved for publication, ANSLG did not know of any patent applic
21、ations, patents pending, or existing patents. ANSLG shall not be held responsible for identifying any or all such patent rights. 2 Normative references The following standards contain provisions, which through reference in this text constitute provisions of this American National Standard. At the ti
22、me 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 editions of the standards indicated below. ANSI C78.20-2003, Ameri
23、can National Standard for Incandescent Lamps - A, G, PS and Similar Shapes with E26 Medium Screw Bases ANSI C78.22-1995, American National Standard for Incandescent Lamps - A, G, PS and Similar Shapes with E39 Mogul Screw Bases ANSI C78.23-1995, American National Standard for Incandescent Lamps - Mi
24、scellaneous Types ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 6 of 53 ANSI C78.30-1997, Procedure for Use in Preparation of Incandescent Lamp Space Drawings1 ANSI/IEC C78.60360-2002, Standard Method of Measurement of La
25、mp Cap Temperature Rise ANSI_ANSLG C78.60432:1-2007, Incandescent Lamps - Safety Specifications - Tungsten Filament Lamps for Domestic and Similar General Lighting Purposes - Part 1 ANSI_ANSLG C78.60432:2-2007, Incandescent Lamps - Safety Specifications - Tungsten Halogen Lamps for Domestic and Simi
26、lar General Lighting Purposes - Part 2 ANSI C78.379-2006, Method for the Classification of the Beam Patterns of Reflector Lamps ANSI C79.1-2002, Nomenclature for Glass Bulbs Intended for Use with Electric Lamps ANSI_ANSLG C81.61-2009, Specifications for Bases (Caps) for Electrical Lamps ANSI_ANSLG C
27、81.63-2009, Gauges for Electrical Bases and Lampholders IESNA LM-20-1994, IESNA Approved Method for Photometric Testing of Reflector-type Lamps2IESNA LM-45-2000, IESNA Approved Method for Electrical and Photometric Measurements of General Service Incandescent Filament Lamps IESNA LM-54-1999, IES Gui
28、de to Lamp Seasoning 3 Definitions and abbreviations In addition to bulb and base codes that are defined in the referenced standards, some terms common to the industry are utilized in this standard and used in Table 1. 3.1 MOL (Maximum Overall Length): Distance along the lamp axis from eyelet solder
29、 to top or face of bulb. 3.2 LCL (Light Center Length): Distance from the reference plane (eyelet solder for screw bases) to the center of the light-emitting filament of the lamp. 1Available from the American National Standard Institute 2Available from the Illuminating Engineering Society ANSI_ANSLG
30、 C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 7 of 53 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 lin
31、e item in Table 1 is a class. 3.4 Voltage range: A series of rated voltages related to commonly available supply lines. A footnote to Table 1 lists several common voltage ranges that apply to classes of lamps in this standard. 3.5 Rated wattage: Wattage marked on lamp. See IESNA LM-45 for measuremen
32、t of wattage. 3.6 Rated voltage: The voltage marked on the lamp. If lamps are marked with a range voltage 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 temperature rise: The surface
33、 temperature rise above ambient temperature of a standard test lampholder fitted to the lamp, when measured according to the standard method. Maximum base temperature rise limits apply to base-up burn position at which maximum temperature rise occurs unless lamps are restricted to other burn positio
34、ns by their manufacturers. See ANSI/IEC C78.60360 for method of measurement. 3.8 Service: The field of most common application for a given lighting source. Service indicated in this standard is not necessarily the only application. “Spotlight“ and “floodlight” are generic terms only used to describe
35、 either spot or flood light service. 4 Lamp designations This standard does not place any control over lamp designations. Incandescent reflector lamps are generally designated by wattage, bulb type, and voltage ratings. Additional codes may be applied by lamp manufacturers. See lamp manufacturers ca
36、talogs for more detailed information. 5 Bulb designations Bulb designations used in this standard are defined in ANSI C79.1 and used in Table 1. Since the traditional eighth-inch sizes have long been utilized in some lamp designations, they are so used in this standard. The metric equivalents are sh
37、own in parentheses. Certain bulbs are noted in Table 1 with “BR“ and “ER” designations, which are used by most manufacturers. These are the same as “RB“ and “RE“ bulb designations in ANSI C79.1. ANSI_ANSLG C78.21-2011 Revision and redesignation of ANSI C78.21-2003 2011 by American National Standard
38、Lighting Group Page 8 of 53 PAR is a designation that means “parabolic aluminized reflector” mostly applied to pressed hard glass, two-part (lens and reflector) reflector lamps. Some R-lamps are also made with hard glass, so noted in Table 1. PAR16 compact reflector lamps made with ceramic enclosure
39、s are also listed. Other R-lamps are made with soft glass, and soft glass is implied unless otherwise noted. 6 Bulb finish 6.1 Reflector Bulbs used in PAR and R lamps usually have an internal metallic coating on the reflector section of the bulb for directing a light beam out through the lens. Somet
40、imes dichroic coatings are used in the reflector section of the bulb, for selective transmission of infrared energy through that area. 6.2 Lens Only those R lamps with clear, inside-frosted, and lens end lens sections are considered in this standard unless otherwise noted. Similarly, PAR lamps with
41、clear lenses, stippled patterns, or molded prescriptions are considered. Colored coatings are not covered unless specifically noted. 7 Beam photometry and classification See IESNA LM-20 for method of photometry testing of reflector lamps. See ANSI C78.379 for information on classification of beam pa
42、tterns. 8 Lamp drawings 8.1 Lamp space drawings in part III For each bulb-base-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. T
43、he space shown shall accommodate the longest and shortest lamps with maximum bowl and neck diameters and maximum bulb eccentricity. These drawings were prepared in accordance with the lamp space drawing procedures in ANSI C78.30. The following general conditions apply to the construction of these sp
44、ace drawings: a. Straight lines are used as much as possible to simplify the space outlines. All compromises with the actual space are in excess of the actual space required. b. All excursions of a lamp bulb are shown relative to a fixed-position base. ANSI_ANSLG C78.21-2011 Revision and redesignati
45、on of ANSI C78.21-2003 2011 by American National Standard Lighting Group Page 9 of 53 c. Bulb eccentricity with respect to the base axis is a combination of allowances for angular tilt (skewness) and lateral displacement (true eccentricity). An eccentricity angle of 3 degrees applies generally to in
46、candescent lamps unless special applications require tighter limits. d. The base contact-making gauge for each type of base controls the space near the rim of the base in the base-to-neck transition zone. e. All dimensions are in millimeters unless otherwise specified. f. Most figure numbers shown i
47、n the figures and in Table 1 relate directly to old American National Standards for that category. For instance, Figure C78.21-254 is derived from the superseded Standard, ANSI C78.254-1966. 8.2 Product drawings in part IV A different situation occurs with those lamps that are not held in place by t
48、he base to lampholder fit. These rim-mounted PAR lamps are held in place at a seating plane on the bulb, and the terminals provide only electrical continuity, not mechanical stability for the entire lamp. Drawings of such lamps are product drawings and not lamp space drawings. They define the dimensions of finished lamps. Their positions and space requirements are determined by the rim-holding devices of their luminaires. 9 Electri
