1、 IEC 60238 Edition 9.0 2016-07 REDLINE VERSION Edison screw lampholders IEC 60238:2016-07 RLV(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized i
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10、r assistance, please contact the Customer Service Centre: csciec.ch. IEC 60238 Edition 9.0 2016-07 REDLINE VERSION Edison screw lampholders INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.140.10 ISBN 978-2-8322-3538-6 Registered trademark of the International Electrotechnical Commission Warning! Ma
11、ke sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 60238:2016 RLV IEC 2016 CONTENTS FOREWORD 4 1 General . 1 Scope .6 2 Normative references 7 3 Terms and definitions 8 4 General requirement 12 5 General conditions for tests . 12 6 Standard ratings 14 7 Cl
12、assification . 15 8 Marking . 16 9 Dimensions . 18 14 Switched lampholders 33 12 Provision for earthing 27 13 Construction 28 10 Protection against electric shock 21 11 Terminals 23 15 Moisture resistance, insulation resistance and electric strength 34 16 Mechanical strength 36 17 Screws, current-ca
13、rrying parts and connections . 41 18 Creepage distances and clearances 42 19 Normal operation . 46 20 General resistance to heat . 47 21 Resistance to heat, fire and tracking 49 22 Resistance to excessive residual stresses (season cracking) and to rusting . 52 Annex A (normative) Season cracking/cor
14、rosion test 73 Annex B (informative) Guidance for requirements in IEC 61058-1 applicable to switches in lampholders (see 14.2) . 75 Annex C (informative) Guidance for special requirements in appliance standards Household and similar electrical appliances 77 Annex D (informative) Schedule of amended
15、subclauses containing more serious/critical requirements which require products to be retested . 79 Bibliography . 80 Figure 1a Nipple thread for lampholders: metric thread. Basic profile and design profile for the nut and for the screw . 53 Figure 1b Nipple thread for lampholders: ISO standard pipe
16、 thread. Basic profile and design profile for the nut and for the screw 54 Figure 2a Gauges for metric ISO thread for nipples 55 Figure 2b Gauges for ISO standard pipe thread for nipples . 56 Figure 3 Gauge for holes for backplate lampholder screws . 57 Figure 4 Normal operation test apparatus . 58
17、Figure 5 Test caps for the test of Clause 18 . 59 IEC 60238:2016 RLV IEC 2016 3 Figure 6 Torque apparatus . 60 Figure 7 Tumbling barrel 61 Figure 8 Impact-test apparatus 62 Figure 9 Pressure apparatus 63 Figure 10 Ball-pressure test apparatus . 63 Figure 11 Test cap for the tests of 15.4 and 20.3 64
18、 Figure 12 Bending apparatus . 65 Figure 13 Test cap A and test cap B for lampholders E14 (2 of 2) . 67 Figure 14 Test cap for lampholders E27 . 68 Figure 15 Test cap for lampholders E40 . 69 Figure 16 Standard test finger (according to IEC 60529) 70 Figure 17 Clarification of some definitions 71 Fi
19、gure 18 Preparation of specimens for the needle-flame test of 21.4 . 72 Table 1 Thickness of screw shells and contacts . 19 Table 2 Minimum effective screw lengths . 20 Table 3 Dimensions of threaded entries and set screws . 21 Table 4 Minimum dimensions of pillar-type terminals 25 Table 5 Minimum d
20、imensions of screw-type terminals 25 Table 6 Pull and torque values . 31 Table 7 Insertion torque . 33 Table 8 Minimum and maximum removal torques . 33 Table 9 Test cap dimensions . 37 Table 10 Heights of fall 38 Table 11 Maximum deformation values 40 Table 12 Torque values . 41 Table 13a Minimum di
21、stances for AC (50/60 Hz) sinusoidal voltages: Impulse withstand category II . 44 Table 13b Minimum distances for AC (50/60 Hz) sinusoidal voltages: Impulse withstand category III 45 Table 14 Minimum distances for non-sinusoidal pulse voltages. 45 Table 15 Heating cabinet temperatures 48 Table A.1 p
22、H adjustment 73 4 IEC 60238:2016 RLV IEC 2016 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ EDISON SCREW LAMPHOLDERS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committ
23、ees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Availabl
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33、his Redline version is not an official IEC Standard and is intended only to provide the user with an indication of what changes have been made to the previous version. Only the current version of the standard is to be considered the official document. This Redline version provides you with a quick a
34、nd easy way to compare all the changes between this standard and its previous edition. A vertical bar appears in the margin wherever a change has been made. Additions are in green text, deletions are in strikethrough red text. IEC 60238:2016 RLV IEC 2016 5 International Standard IEC 60238 has been p
35、repared by subcommittee 34B: Lamp caps and holders, of IEC technical committee 34: Lamps and related equipment. This ninth edition cancels and replaces the eighth edition published in 2004, Amendment 1: 2008 and Amendment 2:2011. This edition constitutes a technical revision. This edition includes t
36、he following significant technical changes with respect to the previous edition: a) Addition of a pull test for certain E5 and E10 lampholders. b) Annex D listing amended requirements/clauses which require products to be retested. The text of this standard is based on the following documents: FDIS R
37、eport on voting 34B/1852/FDIS 34B/1860/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. In this standard, the following print ty
38、pes are used: compliance statements: in italic type. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publicati
39、on will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The “colour inside” logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this
40、 publication using a colour printer. 6 IEC 60238:2016 RLV IEC 2016 EDISON SCREW LAMPHOLDERS 1 General 1 Scope This International Standard applies to lampholders with Edison thread E14, E27 and E40, designed for connection to the supply of lamps and semi-luminaires 1only. It also applies to switched-
41、lampholders for use in AC circuits only, where the working voltage does not exceed 250 V r.m.s. This standard also applies to lampholders with Edison thread E5 designed for connection to the supply mains of series connected lamps, with a working voltage not exceeding 25 V, to be used indoors, and to
42、 lampholders with Edison thread E10 designed for connection to the supply mains of series connected lamps, with a working voltage not exceeding 60 V, to be used indoors or outdoors. It also applies to lampholders E10 for building-in, for the connection of single lamps to the supply. These lampholder
43、s are not intended for retail sale. As far as it reasonably applies, this standard also covers lampholders other than lampholders with Edison thread designed for connection of series-connected lamps to the supply. NOTE This type of lampholder is for example used in Christmas tree lighting chains. As
44、 far as it reasonably applies, this standard also covers adapters. This standard also covers lampholders which are, wholly or partly, integral with a luminaire or intended to be built into appliances. It covers the requirements for the lampholder only. For all other requirements, such as protection
45、against electric shock in the area of the terminals or of the lamp cap, the requirements of the relevant appliance standard shall be are observed and tested after building into the appropriate equipment, when that equipment is tested according to its own standard. Such lampholders as well as lamphol
46、ders provided with a snap-on outer shell, for use by luminaire manufacturers only, are not for retail sale. This standard applies to lampholders to be used indoors or outdoors in residential as well as in industrial lighting installations. It also applies to candle lampholders. In locations where sp
47、ecial conditions prevail, as for street lighting, on board ships, in vehicles and in hazardous locations, for example where explosions are liable to occur, special constructions may be required. NOTE 1 This standard does not apply to three-light lampholders E26d. NOTE 2 This standard is based on the
48、 following data relative to lamps for general lighting service: caps E14 are used for lamps with a current not exceeding 2 A; caps E27 are used for lamps with a current not exceeding 4 A; caps E40 are used for lamps with a current not exceeding 16 A, or 32 A if the nominal voltage of the supply does
49、 not exceed 130 V (see 5.5 and 6.3). _ 1Requirements for lampholders suitable for semi-luminaires are under consideration. IEC 60238:2016 RLV IEC 2016 7 NOTE 3 If the nominal voltage of the supply does not exceed 130 V, the maximum current for caps E40 is 32 A (see 4.5 and 5.3). NOTE 4 Where lampholders are used in luminaires, their maximum operating temperatures are specified in IEC 60598. 2 Normative references The following docum
