1、BRITISH STANDARD BS EN 60999-2:2003 Connecting devices Electrical copper conductors Safety requirements for screw-type and screwless-type clamping units Part 2: Particular requirements for clamping units for conductors above 35 mm 2up to 300 mm 2(included) The European Standard EN 60999-2:2003 has t
2、he status of a British Standard ICS 29.120.20; 29.130.20 BS EN 60999-2:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 12 August 2003 BSI 12 August 2003 ISBN 0 580 42394 8 National foreword This British Standard is the official English l
3、anguage version of EN 60999-2:2003. It is identical with IEC 60999-2:2003. The UK participation in its preparation was entrusted by Technical Committee PEL/17, Switchgear, controlgear, and HV-LV co-ordination, to Subcommittee PEL/17/2, Low-voltage switchgear and controlgear, which has the responsibi
4、lity to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “Inte
5、rnational Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a B
6、ritish Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international
7、 and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last i
8、ssued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60999-2 NORME EUROPENNE EUROPISCHE NORM July 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Cen
9、tral Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60999-2:2003 E ICS 29.120.20;29.130.20 English version Connecting devices Electrical copper conductors Safety requirement
10、s for screw-type and screwless-type clamping units Part 2: Particular requirements for clamping units for conductors above 35 mm up to 300 mm (included) (IEC 60999-2:2003) Dispositifs de connexion Conducteurs lectriques en cuivre - Prescriptions de scurit pour organes de serrage vis et sans vis Part
11、ie 2: Prescriptions particulires pour les organes de serrage pour conducteurs au-dessus de 35 mm et jusqu 300 mm (inclus) (CEI 60999-2:2003) Verbindungsmaterial Elektrische Kupferleiter - Sicherheitsanforderungen fr Schraubklemmstellen und schraubenlose Klemmstellen Teil 2: Besondere Anforderungen f
12、r Klemmstellen fr Leiter ber 35 mm bis einschlielich 300 mm (IEC 60999-2:2003) This European Standard was approved by CENELEC on 2003-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a
13、national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A versi
14、on in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denm
15、ark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EN 69909-:20023 - - 2 Foreword The text of document 17B/1274/FDIS, future edition 2 of IEC 60999-2, prepared
16、by SC 17B, Low- voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60999-2 on 2003-07-01. This part of EN 60999 should be read in conjunction with EN 60999-1:2000. The following dates were fix
17、ed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-07-01 As the AWG sizes are not used in Europ
18、e the following apply: - Clause 6: delete the note; - Table 1: delete columns 4, 5 and 6; - Table 1: delete the text of the note after “IEC 60228A”; - Table 2: delete column 2; - Table C.2: delete Table C.2 completely; - Bibliography: delete the bibliography completely. Annexes designated “normative
19、“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annexes B, C and ZA are normative and annex A is informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60999-2:2003 wa
20、s approved by CENELEC as a European Standard without any modification. _ Page2 EN609992:2003 CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references.5 3 Definitions5 4 General6 5 General notes on tests .6 6 Main characteristics6 7 Connection of conductors.6 8 Constructional requirements.7 9 Tests8
21、Annex A (informative) Relationship between mm 2and AWG/kcmil sizes 14 Annex B (normative) Conductor rated cross-section and corresponding gauges.15 Annex C (normative) Construction of stranded and flexible conductors 16 Annex ZA (normative) Normative references to international publications with the
22、ir corresponding European publications17 Bibliography18 Figure 1 Test apparatus according to 9.4.13 Figure 2 Gauges of form A and form B.13 Table 1 Relationship between rated cross-section and diameter of conductors 7 Table 2 Test values for flexion and pull-out tests for round copper conductors.10
23、Table 3 Tightening torques for the verification of the mechanical strength of screw- type terminals .11 Table A.1 Approximate relationship between mm 2and AWG/kcmil sizes14 Table B.1 Rated cross-section and corresponding gauges .15 Table C.1 Construction of stranded and flexible conductors according
24、 to rated cross-sections.16 Table C.2 Construction of stranded and flexible conductors according to AWG/kcmil sizes.16 Page3 EN609992:2003 INTRODUCTION This safety standard is a continuation of IEC 60999-1 and covers clamping units for copper conductors above 35 mm 2up to and including 300 mm 2 . Th
25、e scope of IEC 60999-1 is limited up to 35 mm 2 . This standard gives guidance to technical committees using clamping units above 35 mm 2up to 300 mm 2 . Page4 EN609992:2003 CONNECTING DEVICES ELECTRICAL COPPER CONDUCTORS SAFETY REQUIREMENTS FOR SCREW-TYPE AND SCREWLESS-TYPE CLAMPING UNITS Part 2: P
26、articular requirements for clamping units for conductors above 35 mm 2up to 300 mm 2(included) 1 Scope This part of IEC 60999 applies to screw-type and screwless-type clamping units for connecting devices, either as separate entities or as integral parts of equipment, for the connection of electrica
27、l copper conductors (complying with IEC 60228), rigid stranded and/or flexible, having a cross-section above 35 mm 2and up to and including 300 mm 2and equivalent AWG/kcmil sizes with a rated voltage not exceeding 1 000 V a.c. and a frequency up to and including 1 000 Hz and 1 500 V d.c. It applies
28、to clamping units primarily suitable for connecting unprepared conductors. This standard does not apply to clamping units: for connection by crimping or soldering; for non-universal clamping units defined in 3.10.2 of IEC 60999-1. 2 Normative references The following referenced documents are indispe
29、nsable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60228:1978, Conductors of insulated cables Amendment 1 (1993) IEC 60228A:1982, Conductors o
30、f insulated cables First supplement IEC 60999-1:1999, Connecting devices Electrical copper conductors Safety requirements for screw-type and screwless-type clamping units Part 1: General requirements and particular requirements for clamping units for conductors from 0,2 mm 2up to 35 mm 2(included) 3
31、 Definitions For the purposes of this part of IEC 60999, Clause 3 of IEC 60999-1 applies, with the following modifications. Definition 3.10.2 of IEC 60999-1 is not applicable. Page5 EN609992:2003 3.11 rated cross-section of a clamping unit value of connectable conductor cross-section stated by the m
32、anufacturer and to which certain thermal, mechanical and electrical requirements are referred NOTE The rated cross-section is the equivalent of the rated connecting capacity in accordance with 3.11 of IEC 60999-1. 4 General Clause 4 of IEC 60999-1 applies. 5 General notes on tests Clause 5 of IEC 60
33、999-1 applies. 6 Main characteristics The standard rated cross-sections of a clamping unit are: 50 mm 2 , 70 mm 2 , 95 mm 2 , 120 mm 2 , 150 mm 2 , 185 mm 2 , 240 mm 2and 300 mm 2 . NOTE For the time being, in some countries, the designation by wire gauges (e.g. AWG in USA and Canada) may be used in
34、stead of the cross-sections expressed in square millimetres. For the approximate relationship between square millimetres and AWG/kcmil see Annex A. 7 Connection of conductors 7.1 In general, clamping units are suitable to accept one conductor only. Certain types may also be used for two or more cond
35、uctors of the same or of different nominal cross-sections or compositions. Clamping units shall accept unprepared conductors. NOTE Screw-type clamping units are not suitable for the connection of flexible conductors with tin soldered ends. 7.2 Each clamping unit, if not otherwise stated in the relev
36、ant product standard, shall, in addition to its rated cross-section, accept at least the two successive smaller cross-sections (e.g. a clamping unit having the rated cross-section of 70 mm 2shall reliably clamp a conductor of the same type of 35 mm 2 , 50 mm 2or 70 mm 2 ). If a clamping unit covers
37、a range larger than the minimum, this shall be marked either on the clamping unit or stated in the manufacturers literature. 7.3 The theoretical diameter of the largest conductor and the relationship between the rated cross-section and connectable conductors are given in Table 1. Page6 EN609992:2003
38、 Table 1 Relationship between rated cross-section and diameter of conductors Theoretical diameter of the largest conductor Metric AWG/kcmil Rated cross- section Rigid stranded Flexible aGauge Rigid stranded Flexible Connectable conductors mm mm mm mm mm Rigid Flexible 50 9,1 11,0 0 9,64 12,08 70 11,
39、0 13,1 00 11,17 13,54 95 12,9 15,1 000 12,54 15,33 0000 14,08 17,22 120 14,5 17,0 250 15,34 19,01 150 16,2 19,0 300 16,80 20,48 185 18,0 21,0 350 18,16 22,05 400 19,42 24,05 240 20,6 24,0 500 21,68 26,57 300 23,1 27,0 600 23,82 30,03 To be specified in the relevant product standard a Dimensions for
40、class 5 flexible conductors only, according to IEC 60228A. NOTE Diameters of the largest rigid and flexible conductors are based on Table 1 and Table 3 of IEC 60228A and, for AWG conductors, on ASTM B 172-71 1 1 , ICEA Publication S-19-81 2, ICEA Publication S-66-524 3 and ICEA Publication S-66-516
41、4. 7.4 Clamping units, unless otherwise specified by the manufacturer, shall accept rigid stranded and flexible conductors as indicated in Table 1, in which case no markings are necessary. If a clamping unit according to the manufacturers specification can accept only one type of conductor (rigid or
42、 flexible), this shall be either clearly marked on the end product, respectively by the letters “r” or “f”, or indicated on the smallest package unit and/or in the technical information. Compliance shall be checked by inspection and by the tests of 9.1 and 9.6. 7.5 On screwless-type clamping units,
43、the connection or disconnection of conductors shall be made by the use of a general purpose tool, or of a convenient device integral with the clamping unit, in order to open it for the insertion or the withdrawal of the conductors. Compliance shall be checked by inspection and by the test of 9.3. 8
44、Constructional requirements Clause 8 of IEC 60999-1 applies with the following modifications. Replace 8.1.1 of IEC 60999-1 as follows: 1Figures in square brackets refer to the bibliography. Page7 EN609992:2003 8.1.1 Parts of clamping units mainly intended for carrying current, shall be of copper, or
45、 an alloy containing at least 58 % copper for parts that are worked cold or at least 50 % copper for other parts, or other metal with surface protection offering a resistance to corrosion not less than that of copper and having mechanical properties at least equivalent. Compliance shall be checked b
46、y inspection and by the test specified in the relevant product standard. 8.1.2 Not applicable. 8.4 The note is not applicable. 9 Tests 9.1 The insertion of the largest conductor is checked by the test according to Annex B, or by the insertion of the largest conductor after the insulation has been re
47、moved and the ends of the rigid stranded and of the flexible conductors have been reshaped. NOTE The manufacturer may specify the test method. The stripped end of the conductor shall be able to enter completely within the clamping unit aperture, without use of undue force. 9.2 Three new clamping uni
48、ts are fitted with new conductors of the type and of the rated cross-section according to Table 1 and whose core composition complies with Annex C. Before insertion into the clamping unit, wires of stranded rigid conductors and flexible conductors may be reshaped. The use of a tool is permitted. It
49、shall be possible to fit the conductor into the clamping unit without use of undue force. The conductor is inserted into the clamping unit until it just protrudes from the far side of the clamping unit if possible, and in the position most likely to allow the wire to escape. The clamping screws, if any, are then tightened with a torque as shown in 9.6. After the t
