1、BRITISH STANDARD BS 6991:1990 Implementing Amendment No. 1, not published separately Specification for 6/10 A, two-pole weather-resistant couplers for household, commercial and light industrial equipmentBS6991:1990 This British Standard, having been prepared under the directionof the Power Electrica
2、l Engineering Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 28 September 1990 BSI 11-1998 The following BSI references relate to the work on this standard: Committee reference PEL/4 Draft for comment 85/29567 DC ISBN 0 580 16864 6 Committe
3、es responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/-) to Technical Committee PEL/4, upon which the following bodies were represented: Association of Consulting Engineers Association of Co
4、ntrol Manufacturers TACMA (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances ASTA Certification Services British Electrical Systems Association (BEAMA Ltd.) British Electrotechnical Approvals Board British Plastics Federation Consumer Standards Advisory Committee of BSI Deco
5、rative Lighting Association Department of Health and Social Security Department of Trade and Industry (Consumer Safety Unit, C S Division) ERA Technology Ltd. Electrical Contractors Association Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electrical Power Engineers Associ
6、ation Electricity Supply Industry in England and Wales Institution of Electrical Engineers Lighting Industry Federation Ltd. National Inspection Council for Electrical Installation Contracting The following bodies were also represented in the drafting of the standard, through subcommittees and panel
7、s: British Lawn Mower Manufacturers Federation British Radio and Electronic Equipment Manufacturers Association Electronic Components Industry Federation Amendments issued since publication Amd. No. Date of issue Comments 9294 November 1996 Indicated by a sideline in the marginBS 6991:1990 BSI 11-19
8、98 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 General requirements 2 4 General conditions for type testing 2 5 Ratings 3 6 Classification 3 7 Marking 3 8 Instructions for use 4 9 Dimensions and compatibility 4 10 Creepage distances, clearances a
9、nd distances through insulation 5 11 Accessibility of live parts 5 12 Construction 6 13 Terminals and terminations 9 14 Screws, current-carrying parts and connections 10 15 Provision for flexible cords 11 16 Resistance to ageing 13 17 Resistance to moisture and humidity 13 18 Insulation resistance a
10、nd electric strength 14 19 Electrical breaking capacity 14 20 Normal operation 15 21 Temperature rise 15 22 Mechanical strength 15 23 Resistance to heat 17 24 Resistance of insulating material to abnormal heat and fire 17 25 Resistance to tracking 17 26 Resistance to excessive residual stresses and
11、to rusting 17 Appendix A Test schedule 19 Appendix B Test for resistance to excessive residual stresses and to rusting 19 Figure 1 Connector 20 Figure 2 Equipment inlet 21 Figure 3 GO gauge for connector 22 Figure 4 Primary and supplementary GO gauges for equipment inlets 23 Figure 5 Apparatus for t
12、esting inadvertent disconnection of accessories 24 Figure 6 Withdrawal pull gauge 25 Figure 7 Apparatus for testing the cord anchorage 26 Figure 8 Apparatus for the flexing test 27 Figure 9 Apparatus for breaking capacity and normal operation tests 28 Figure 10 Circuit diagram for breaking capacity
13、and normal operation tests 29 Figure 11 Tumbling barrel 30 Figure 12 Impact test apparatus (test hammer) 31 Figure 13 Ball pressure test apparatus 31BS6991:1990 ii BSI 11-1998 Page Figure 14 Apparatus for pressure test on connectors 32 Figure 15 Device for testing non-solid pins 33 Figure 16 Pillar
14、terminals 34 Table 1 Minimum creepage distances and clearances 5 Table 2 Test torque levels 7 Table 3 Forces exerted by components 7 Table 3a Withdrawal forces 7 Table 3b Maximum diameters of cords 14 Table 4 Test schedule 19 Table 5 Test solution pH values 19 Publications referred to Inside back co
15、verBS 6991:1990 BSI 11-1998 iii Foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee. It is based on a draft prepared by the Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) and specifies the requi
16、rements for equipment couplers for use on outdoor equipment such as lawn-mowers and hedge cutters, as well as for general household equipment. A British Standard does not purport to include all the necessary provisions of a contract. Users of British standards are responsible for their correct appli
17、cation. Compliance with a British 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 to iv, pages1to 34, an inside back cover and a back cover. This standard has been updated (see copyright date)
18、and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.iv blankBS 6991:1990 BSI 11-1998 1 1 Scope This British Standard specifies requirements for 6/10 A two-pole, polarized couplers for household, commercial and light industrial equipment wi
19、th particular reference to safety and interchangeability in normal use. This standard applies to couplers which are suitable for the connection of the supply voltage to Class II portable appliances and are intended for indoor and outdoor use operating at voltages not exceeding 250 V. They are capabl
20、e of safe operation in conditions of splashing water as defined by IPX4 in BS 5490 and are intended for use with circular type insulated and sheathed flexible cords and cables complying with Tables 6, 9 and 16 of BS 6500:1984, having conductor cross-sectional areas of 0.5mm 2 , 0.75mm 2or 1.0 mm 2 .
21、 Couplers are suitable for use at an ambient temperature of 5 C to 40 C, the average value over a 24 h period not exceeding 35 C. Requirements are specified for rewirable and non-rewirable connectors and also for rewirable and non-rewirable inlets. NOTEThe titles of the publications referred to in t
22、his standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. NOTEThe terms “voltage” and “current” imply r.m.s. values unless otherwise stated. 2.1 accessory connector or equipment inlet 2.2 coupler a means consisting of a
23、 connector and equipment inlet, enabling the connection and disconnection of the supply to Class II equipment 2.3 connector the part of a coupler which is integral with, or intended to be attached to, the flexible cord connected to the supply 2.4 equipment inlet a part of a coupler which is connecte
24、d to or intended to be connected to equipment 2.5 free equipment inlet an equipment inlet intended to be attached by a flexible cord to equipment 2.6 fixed equipment inlet an equipment inlet integrated in, or intended to be fixed to, equipment 2.7 non-rewirable accessory an accessory so constructed
25、that it forms a constructional unit with the flexible cord such that the flexible cord cannot be separated from the accessory without making it permanently useless, and the accessory cannot be opened by hand or by using a general purpose tool, e.g. a screwdriver and/or pliers, without making the acc
26、essory permanently useless NOTEAn accessory is considered to be permanently useless when, for reassembly of the accessory, parts or materials other than the original need to be used. 2.8 rewirable accessory an accessory so constructed that a cable or flexible cord can be fitted or replaced using gen
27、eral purpose tools 2.9 termination the part of the accessory to which a conductor is permanently attached 2.10 terminal the part of the accessory to which a conductor is attached, providing a re-usable connection without special tools 2.11 screw-type terminal a terminal for the connection and subseq
28、uent disconnection of a conductor, the connection being made, directly or indirectly, by means of screws or nuts of any kind 2.12 pillar terminal a screw-type terminal in which the conductor is inserted into a hole or cavity where it is clamped under the shank of a screw NOTEThe clamping pressure ma
29、y be applied directly by the shank of the screw or through an intermediate clamping plate to which pressure is applied by the shank of the screw. 2.13 screw terminal a screw-type terminal in which the conductor is clamped under a head of a screw NOTEThe clamping pressure may be applied directly by t
30、he head of the screw or through an intermediate part, such as a washer, clamping plate or antispread device.BS6991:1990 2 BSI 11-1998 2.14 stud terminal a screw-type terminal in which the conductor is clamped under a nut NOTEThe clamping pressure may be applied directly by a suitably shaped nut or t
31、hrough an intermediate part, such as a washer, clamping plate or antispread device. 2.15 mantle terminal a screw-type terminal in which the conductor is clamped against the base of the slot in a threaded stud by means of a nut NOTEThe conductor is clamped against the base of the slot by a suitably s
32、haped washer under the nut, by a central peg if the nut is a cap nut, or by equally effective means for transmitting the pressure from the nut to the conductor within the slot. 2.16 accessible surface of an accessory any surface of an accessory that can be touched by means of test Finger III of BS 3
33、042, when the accessory is assembled as in normal use and in the following conditions: a) for connectors: without the complementary accessory in engagement but with the cover in the open position; b) for equipment inlets: with the complementary accessory in the most unfavourable degree of engagement
34、 but such that electrical contact is made between the terminations. 2.17 type test a test of one or more devices made to a certain design to show that the design meets certain specifications 2.18 type test sample a sample consisting of one or more similar devices submitted for the purpose of a type
35、test 2.19 cover a part that covers the contacts of a connector when the mating part is not in place (see lower two views of Figure 1) and which is accessible when the accessory is in normal use, and is removable only with the use of a tool but does not require the use of a tool to open it 3 General
36、requirements Accessories shall be so designed and constructed that, in normal use, their performance is reliable and without danger to the user or surroundings. Accessories shall be capable of meeting all the relevant requirements and tests specified herein. NOTEWhere tolerances are not specified in
37、 this standard the values are to be regarded as nominal. 4 General conditions for type testing 4.1 A manufacturer or responsible vendor, who claims compliance with this standard for any product, shall submit a representative sample of that product to the relevant tests of this standard in the order
38、specified in 4.3. NOTEThe tests may be made by the manufacturer, or the responsible vendor, or may be made on his behalf by any competent testing laboratory or certification authority. The results of such tests shall be recorded. 4.2 Unless otherwise specified in this standard the accessories shall
39、be tested as delivered by the manufacturer or responsible vendor and under normal conditions of use, at an ambient temperature of 20 5 C. The accessories used for the tests shall be substantially identical to normal production items in respect of all details which may affect the test results. Non-re
40、wirable accessories shall be supplied for test with a flexible cord which shall be at least 1 m long. The flexible cord used for rewirable accessories shall be polyvinyl-chloride (PVC) sheathed circular flexible cord complying with Table 16 of BS 6500:1984. 4.3 A total sample comprising 18 accessori
41、es, of any one type, shall be submitted to inspection and tests in the following order of clauses: a) three accessories: clauses 3 to 16 (visual inspection and manual examination); b) three accessories: clauses 12 to 15 (excluding 15.2.2) and clauses 17 to 23 (general tests); c) three accessories: c
42、lauses 16 and 24; d) three accessories: 15.2.2; e) three accessories: clause 25 (material test); f) three accessories: clause 26. NOTE 1If any particular test is repeated, as part of the normal sequence, this requirement is specified in the appropriate clause. NOTE 2A test schedule of samples is giv
43、en in appendix A. 4.4 If no accessory fails in the complete series of tests specified in 4.3 then accessories of that type shall be deemed to comply with this standard.BS 6991:1990 BSI 11-1998 3 If one accessory fails in any group in the complete series of tests specified in 4.3, then accessories of
44、 that type shall be deemed to have failed to comply with this standard, unless that accessory can be shown to be not representative of normal production or design, in which case a further set of accessories shall be submitted to the test or tests in that group. If there is no failure in this retest
45、then accessories of that type shall be deemed to comply with this standard. If more than one accessory fails in the complete series of tests specified in 4.3, the accessories of that type shall be deemed to have failed to comply with this standard. 4.5 Where reference to BS 6500:1984 is made, equiva
46、lent flexible cords to the latest version of BS6500 may be used. 5 Ratings 5.1 Couplers shall have a rated voltage of 250 V a.c. 5.2 The rated current shall be as follows: a) for rewirable couplers, 10 A; b) for non-rewirable couplers, appropriate to the attached cable. 6 Classification 6.1 Connecto
47、rs shall be classified as follows: rewirable or non-rewirable. 6.2 Equipment inlets shall be classified as follows: a) rewirable or non-rewirable; b) free or fixed. 7 Marking 7.1 Couplers, except for fixed equipment inlets and non-rewirable free equipment inlets supplied with equipment, shall be mar
48、ked with the following information: a) the name or trade mark of the manufacturer or responsible vendor; b) the number and date of this British Standard, i.e. BS 6991:1990 1) ; c) rated current; d) rated voltage; e) symbol for nature of supply; f) symbol for splashproof construction; g) type referen
49、ce which may be a catalogue number, code number, etc. Fixed equipment inlets shall be marked with the information given in 7.1 a) and 7.1 g) which need not be visible when installed for use outdoors. NOTEThe marking on connectors and free equipment inlets need not be visible when connected together. Compliance shall be checked by inspection. 7.2 Connectors and free equipment inlets shall be marked on their exterior, in a prominent position which is visible during normal use, with lettering at least 3.0 mm high with the
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