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1、BRITISH STANDARD BS 8020:2002 Tools for live working Insulating hand tools for work on or near conductor rail systems operating at voltages up to 1 000 V a.c. or 1 500 V d.c. ICS 13.260 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: London South Bank University
2、, London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Stra
3、tegy Committee on 16 January 2002 BSI 16 January 2002 The following BSI references relate to the work on this British Standard Committee reference PEL/78 Draft for comment 99/203940 DC ISBN 0 580 37728 8 Committees responsible for this British Standard The preparation of this British Standard was en
4、trusted to Technical Committee PEL/78, Tools for live working, upon which the following bodies were represented: Association of Manufacturers Allied to the Electrical and Electronic Industry BECCAMA Electronic Cable Connector and Accessories Manufacturers Association British Glove Association Britis
5、h Safety Industry Federation Chief and Assistant Chief Fire Officers Association Department of Trade and Industry Consumer Safety Unit Department of Trade and Industry Engineering Inspectorate Electricity Association Federation of British Hand Tool Manufacturers GAMBICA Health and Safety Executive A
6、mendments issued since publication Amd. No.DateComment Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 BSI 16 January 2002 i Contents Page Committees responsibleinside front cover Forewordii 1Scope
7、1 2Normative references1 3Terms and definitions1 4Requirements2 5Type tests4 6Routine tests9 7Sample tests9 8Records9 Annex A (normative) Tool categories10 Annex B (informative) Recommendations concerning use and in-service care11 Annex C (normative) Sampling12 Figure 1 Marking symbol3 Figure 2 Exam
8、ple test arrangement for handle grip sleeve adhesion test5 Figure 3 Example test arrangement for handle pull-apart test6 Figure 4 Example test arrangement for handle material bend test6 Figure 5 Example test arrangement for handle torsion test8 Figure 6 Example test arrangement for flammability test
9、9 Table 1 Applied force for handle pull-apart test for category 1 insulating hand tools5 Table C.1 Classification of defects12 Table C.2 Sample sizes for major defects12 Table C.3 Sample sizes for minor defects12 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 0
10、0:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 ii BSI 16 January 2002 Foreword This British Standard has been prepared by Technical Committee PEL/78, Tools for live working. This standard specifies requirements for insulating hand tools for work on or in close proximity to ground-le
11、vel fully exposed live conductor rails providing traction supplies for electrified railways. Such traction supply systems are in wide use in certain areas of Great Britain, particularly in London and southern England. They date from the early days of railway electrification and their design and cons
12、truction impose special requirements concerning tools used for track work, in order to meet modern safety requirements. Whilst BS EN 60900 provides a specification for hand tools for live working, these are tools primarily used by electricians and other electrical personnel. That standard does not p
13、rovide an appropriate specification for the larger, purpose- designed, specialist tools employed in track work. However, full account has been taken of the requirements of BS EN 60900 in the drafting of this standard, to ensure uniformity of approach and common requirements where practicable. Assess
14、ed capability. Users of this British Standard are advised to consider the desirability of quality system assessment and registration against the appropriate standard in the BS EN ISO 9000 series by an accredited third-party certification body, with particular reference to material and chemical bondi
15、ng used in the manufacture of insulating hand tools. Annex A and Annex C are normative. Annex B is informative. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a Briti
16、sh Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document
17、was last issued. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 BSI 16 January 2002 1 1 Scope This British Standard specifies requirements for insulating hand tools required for work on or in clos
18、e proximity to conductor rails providing traction supplies, in accordance with BS EN 50163, for electrified railways and mass transit systems operating at voltages up to 1 000 V a.c. or 1 500 V d.c. It is not applicable to hand-held tools conventionally used by electricians and others for work on li
19、ve electrical apparatus, which are specified in BS EN 60900. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this British Standard. For dated references, subsequent amendments to, or revisions of, any of thes
20、e publications do not apply. For undated references, the latest edition of the publication referred to applies. BS 876:1995, Specification for hand hammers. BS 1421:1995, Specification for picks, beater picks and mattocks. BS 2589:1995, Specification for railway track spanners. BS 2945:1995, Specifi
21、cation for axes and hatchets. BS 3388, Specification for forks, shovels and spades. BS EN 50163:1996, Railway applications Supply voltages of traction systems. BS EN 60900:1998, Hand tools for live working up to 1 000 V a.c. and 1 500 V d.c. 3 Terms and definitions For the purposes of this British S
22、tandard, the following terms and definitions apply. 3.1 insulating hand tool hand tool designed to protect the user from electric shock and to minimize the risk of causing short circuits by bridging between two conductive parts at different potentials; made predominantly of insulating material excep
23、t for metal parts or inserts: at the tool working head(s); or used for reinforcement, but separated from the working head NOTEAnnex A categorizes tools according to their design, construction and intended use. 3.2 tool working head part of an insulating hand tool intended to perform the function of
24、the tool, which may be in contact with or in close proximity to conductor rails 3.3 insulating insert insulating material inserted between two conductive parts, e.g. in the case of a double-ended tool 3.4 type test test of one or more insulating hand tools manufactured to a certain design to show th
25、at the design meets certain specifications 3.5 routine test test to which each individual insulating hand tool is subjected during or after manufacture to ascertain whether it conforms to certain criteria 3.6 sample test test on a selected number of items taken at random from a batch Licensed Copy:
26、London South Bank University, London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 2 BSI 16 January 2002 3.7 material batch purchase lot or production run of each finished length, profile and size of profile of insulating material to be used in th
27、e manufacture of insulating hand tools 3.8 tool batch production run of tools within a particular tool category NOTEDefinitions of tool categories are given in Annex A. 4 Requirements 4.1 General requirements 4.1.1 An insulating hand tool shall be manufactured from the assembly of one or more insula
28、ting parts in conjunction with the conductive tool working head. NOTE 1Insulating parts may be applied over other insulating parts (multi-layer construction). The design and construction of the tool may necessitate some overlap of insulating and conductive parts where joined at the tool working head
29、. NOTE 2When the design, dimensions and construction of an insulating hand tool are checked visually, the tool should be deemed to be safe with respect to: general operation of the tool by a user (i.e. the tool should be deemed not to constitute a danger to the user when used in accordance with the
30、manufacturers instructions); accidental contact by a user with the working head (i.e. it should be deemed that such contact has been minimized); the traction supply system (i.e. the tool should be deemed not to constitute a danger to the traction supply system when used in accordance with the manufa
31、cturers instructions). 4.1.2 Where the handle end incorporates a grip sleeve, the adhesion of the sleeve shall be tested in accordance with and shall conform to the requirements specified in 5.3.2. 4.1.3 All metallic parts shall be securely fixed to the insulating handle or other insulating insert,
32、as appropriate. Conformity shall be verified by means of the test specified in 5.3.3. 4.1.4 The mechanical properties of an insulating hand tool shall conform to the relevant requirements of the appropriate British Standard for an uninsulated tool having the same function: BS 876 for hand hammers; B
33、S 1421 for picks, beater picks and mattocks; BS 2589 for railway track spanners; BS 2945 for axes and hatchets; BS 3388 for forks, shovels and spades. 4.1.5 The insulating material shall be compatible with any other materials used in the construction of the insulating hand tool. Its electrical prope
34、rties shall be tested in accordance with and shall conform to the requirements specified in 5.4.1. Its flame retardancy shall be tested in accordance with and shall conform to the requirements specified in 5.5. 4.1.6 When fibreglass insulating material is required, fibreglass shall be used that cont
35、ains a mass fraction of not less than 60 % fibre, and the fibres of which are tensioned, continuous and parallel. The fibreglass specification shall be obtained from the fibreglass manufacturer and shall be made available to the tester and/or the purchaser if requested. 4.1.7 The colour of insulatin
36、g parts shall be predominantly orange. Where the insulation is formed of several layers each layer shall be of a contrasting colour. 4.1.8 When tested in accordance with BS EN 60900, the component parts of insulating hand tools shall not become detached. Licensed Copy: London South Bank University,
37、London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 BSI 16 January 2002 3 4.2 Additional requirements for particular insulating hand tools If the intended use for an insulating hand tool dictates the necessity for additional requirements particul
38、ar to that use, e.g. a multifunction hand tool such as a permanent way spanner that can be used as both a hammer and a spanner, these shall be agreed between the manufacturer and the purchaser. The additional requirements shall be fully documented and the tool shall conform to these requirements in
39、addition to the general requirements specified in 4.1. 4.3 Marking Every insulating hand tool shall be legibly and permanently marked with the following information: manufacturers name, trade mark or other identification; year of manufacture or traceability mark; double triangle symbol with rated wo
40、rking voltage as shown in Figure 1. The legibility of the marking shall be checked by visual examination as specified in 5.2.1. The durability of the marking shall be tested in accordance with and shall conform to the requirement specified in 5.6. If the purchaser requires additional elements of mar
41、king, e.g. to indicate ownership, these additional requirements shall be agreed between the manufacturer and the purchaser. The additional requirements shall be fully documented and the marking shall conform to these requirements in addition to the general requirements for marking. When tested in ac
42、cordance with 5.4.2, a tool that has been marked shall conform to the requirements specified in 5.4.2. 4.4 Instructions for use For each different insulating hand tool, written instructions shall be provided concerning its intended use and maintenance requirements. For insulating hand tools requirin
43、g to be assembled, additional information shall be provided concerning the correct method of assembly. NOTEAnnex B gives recommendations concerning use and in-service care of insulating hand tools. Dimensions in millimetres Figure 1 Marking symbol 1000 V 81 4 6 Rated working voltage Year of manufact
44、ure (or traceability mark) _ _ Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 00:58:20 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8020:2002 4 BSI 16 January 2002 5 Type tests 5.1 General Conformity to the requirements of clause 4 shall be determined by means
45、 of the series of type tests specified in 5.2, 5.3, 5.4, 5.5 and 5.6, undertaken in the same sequence. Unless otherwise specified, these shall be carried out on at least three insulating hand tools that are representative of a particular tool category (see Annex A). If a tool fails any part of any t
46、ype test, the series of tests shall be repeated on at least six further tools. If any of these six tools fails any part of any type test, the tool shall be deemed to have failed. Unless otherwise specified, tests shall be carried out on insulating hand tools that have been stored for not less than 1
47、6 h at a temperature of (23 5)?C and a relative humidity of 45 % to 75 %, in accordance with BS EN 60900. Unless otherwise specified, the result of each type test shall be within 5 % of the specified value. 5.2 Visual and dimensional check 5.2.1 Visual check The insulating hand tool shall be subject
48、ed to a thorough visual examination and shall be free from constructional defects. The marking shall be checked to determine whether or not it conforms to 4.3. 5.2.2 Dimensional check The dimensions shall be checked to determine whether or not they conform to the manufacturers detailed specification
49、. NOTEThe dimensions should also be checked in accordance with 4.1.1, note 2. 5.3 Mechanical tests 5.3.1 General Before undertaking the mechanical tests, each tool shall be conditioned by placement first in a cooling chamber for 2 h at (?25 3)?C and then in a heating chamber with normal ventilation for 2 h at (70 3)?C. The tool shall be allowed to rest at room temperature for 30 min following each period of conditioning. Mechanical tests on insulating hand tools shall be in accordance either with the follow