SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN Edition 4.2 IEC 60238:2011 Edition 8.2 SOUTH AFRICAN NATIONAL STANDARD Edison screw lampholders This national standard is the identical implementation of IEC 60238:2011 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 Edition 4.2 IEC 60238:2011 Edition 8.2 Table of changes Change No. Date Scope IEC amdt Amended to update a referenced standard, to delete the 750 V standard rating, to add marking requirements, to replace working voltages by rated voltages and to do editorial corrections. IEC amdt Amended to add a figure and definitions, to add requirements to classification and marking and a table on minimum distances for a.c. (50/60 Hz) sinusoidal voltages Impulse withstand category II (table 13a), and to update referenced standards. National foreword This South African standard was approved by National Committee SABS SC 64A, Lighting and optics Lamps and auxiliaries, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in March This SANS document supersedes SANS 60238:2009 (edition 4.1). This SANS document is referenced in the Compulsory specification for lampholders, as published by Government Notice No. R. 860 (Government Gazette 20267) of 9 July 1999.

3 INTERNATIONAL STANDARD NORME INTERNATIONALE IEC Edition Edison screw lampholders Douilles à vis Edison pour lampes INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE PRICE CODE CODE PRIX CR ICS ICS ISBN Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale

4 IEC:2004+A1:2008+A2:2011 CONTENTS FOREWORD General Definitions General requirement General conditions for tests Standard ratings Classification Marking Dimensions Protection against electric shock Terminals Provision for earthing Construction Switched lampholders Moisture resistance, insulation resistance and electric strength Mechanical strength Screws, current-carrying parts and connections Creepage distances and clearances Normal operation General resistance to heat Resistance to heat, fire and tracking Resistance to excessive residual stresses (season cracking) and to rusting Annex A (normative) Season cracking/corrosion test Annex B (informative) Guidance for requirements in IEC applicable to switches in lampholders (see 13.2) Annex C (informative) Guidance for special requirements in appliance standards Household and similar electrical appliances Figure 1a Nipple thread for lampholders. Basic profile and design profile for the nut and for the screw Figure 1b Nipple thread for lampholders. Basic profile and design profile for the nut and for the screw Figure 2a Gauges for metric thread for nipples Figure 2b Gauges for ISO standard pipe thread for nipples Figure 3 Gauge for holes for backplate lampholder screws Figure 4 Normal operation test apparatus Figure 5 Test caps for the test of clause Figure 6 Torque apparatus Figure 7 Tumbling barrel Figure 8 Impact-test apparatus... 66

5 60238 IEC:2004+A1:2008+A2: Figure 8a Mounting support Figure 9 Pressure apparatus Figure 10 Ball-pressure test apparatus Figure 11 Test cap for the tests of 14.4 and Figure 12 Bending apparatus Figure 13 Test cap A and test cap B for lampholders E Figure 13 Test cap A and test cap B for lampholders E14 (continued) Figure 14 Test cap for lampholders E Figure 15 Test cap for lampholders E Figure 16 Standard test finger (according to IEC 60529)The drawings are intended only to show typical parts of a lampholder and should not limit the design Figure 17 Clarification of some definitions Figure 18 Preparation of specimens for the needle-flame test of Table 1 Thickness of screw shells and contacts Table 2 Minimum effective screw lengths Table 3 Dimensions of threaded entries and set screws Table 4 Minimum dimensions of pillar-type terminals Table 5 Minimum dimensions of screw-type terminals Table 6 Pull and torque values Table 7 Insertion torque Table 8 Minimum and maximum removal torques Table 9 Test cap dimensions Table 10 Heights of fall Table 11 Maximum deformation values Table 12 Torque values Table 13a Minimum distances for a.c. (50/60 Hz) sinusoidal voltages Impulse withstand category II Table 13b Minimum distances for a.c. (50/60 Hz) sinusoidal voltages Impulse withstand category III Table 14 Minimum distances for non-sinusoidal pulse voltages Table 15 Heating cabinet temperatures Table A.1 ph adjustment... 50