1、BRITISH STANDARD BS 67:1987 Specification for Ceiling roses UDC 621.315.673:614.8BS67:1987 This British Standard, having been prepared under the directionof the Power ElectricalEngineering StandardsCommittee, was published under the authority ofthe Board of BSI and comesintoeffect on 27 February 198
2、7 BSI 09-1999 First published August 1914 First revision May 1929 Second revision October 1938 Third revision June 1969 Fourth revision February 1987 The following BSI references relate to the work on this standard: Committee reference PEL/4 Draftfor comment 84/27023 DC ISBN 0 580 15692 3 Committees
3、 responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards Committee (PEL/-) to Technical Committee PEL/4, upon which the following bodies were represented: ASTA Certification Services Association of Consulting Engineer
4、s Association of Control Manufacturers TACMA (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances British Electrical Systems Association (BEAMA Ltd.) British Electrotechnical Approvals Board British Plastics Federation Consumer Standards Advisory Committee of BSI Department of
5、 Health and Social Security Department of Trade and Industry (Consumer Safety Unit, C A Division) ERA Technology Ltd. Electrical Association for Women Electrical Contractors Association Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electrical Power Engineers Association El
6、ectricity Supply Industry in England and Wales Institution of Electrical Engineers Lighting Industry Federation Ltd. National Economic Development Office National Inspection Council for Electrical Installation Contracting The following body was also represented in the drafting of the standard, throu
7、gh a subcommittee: Decorative Lighting Association Amendments issued since publication Amd. No. Date of issue CommentsBS67:1987 BSI 09-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Conditions of use 1 3 Definitions 1 4 General requirements 2 5 General conditi
8、ons for type testing 2 6 Ratings 2 7 Classification 2 8 Marking and information 3 9 Dimensions 3 10 Accessibility of live parts 3 11 Provision for earthing 4 12 Terminals 4 13 Construction 7 14 Resistance to moisture and humidity, insulation resistance and electric strength 8 15 Temperature rise 9 1
9、6 Mechanical strength 10 17 Resistance to heat 10 18 Resistance to abnormal heat, fire and tracking 11 19 Screws, current-carrying parts and connections 13 20 Creepage distances and clearances 13 21 Resistance to excessive residual stresses and to rusting 13 Appendix A Measurement of creepage distan
10、ces and clearances 19 Figure 1 Pendulum impact test apparatus 14 Figure 2 Constructional details of striking element 15 Figure 3 Construction details of mounting support for test specimens 15 Figure 4 Ball pressure test apparatus 16 Figure 5 Glow wire with thermocouple 16 Figure 6 Glow-wire test app
11、aratus 17 Figure 7 Arrangement and dimensions of the electrodes for the tracking test 18 Table 1 Terminal screw torque values 5 Table 2 Test currents for test on screwless terminals 7 Table 3 Application of glow-wire test 12 Table 4 Creepage distances and clearances 13 Publications referred to Insid
12、e back coverBS67:1987 ii BSI 09-1999 Foreword This revision of this British Standard has been prepared under the direction of the Power Electrical Engineering Standards Committee and supersedes BS67:1969. This revised standard comes into force immediately, but to allow manufacturers time to design a
13、nd introduce any necessary changes, BS 67:1969 will not be withdrawn until 31 December 1987. NOTEUpon publication of this revision, BSI Sales Department will respond to purchase orders for BS 67 by supplying copies of the 1987 edition. Copies of the 1969 edition may be obtained by quoting the number
14、 “BS 67/BS69” The main purpose of the revision has been to update the standard so as to bring the requirements and tests into line with other recently published BritishStandards for accessories which have taken account of relevant InternationalStandards. A British Standard does not purport to includ
15、e all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. 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, pagesi
16、andii, pages1 to20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS67:1987 BSI 09-1999 1 1 Scope This British Standard specifies requirement
17、s for ceiling roses having maximum ratings of 6 A and250 V intended for use in final circuits rated at16 A maximum for ceiling roses with screw-type supply terminals or 10 A maximum for ceiling roses with screwless supply terminals. The requirements specified in this standard have particular referen
18、ce to safety in use. The ceiling roses are intended for use with cables complying with BS 6004 or BS 6007 having copper conductors and for use with flexible cords complying with BS 6500. Ceiling roses incorporating means other than rewirable terminals, to facilitate the connection and disconnection
19、of lampholders or luminaires, are not covered by this standard. NOTE 1Accessories complying with this standard may be regarded as lighting outlets. NOTE 2The titles of the publications referred to in this standard are listed on the inside back cover. 2 Conditions of use Ceiling roses shall be suitab
20、le for use under the following conditions: a) an ambient temperature having a peak value not exceeding 40 C, with an average value not exceeding 35 C in a period of 24 h, but not subject to exposure to direct radiation from the sun or any other source of heat likely to raise the temperature above th
21、e specified ambient temperature; b) an ambient temperature having a value not less than 5 C; c) an altitude not exceeding 2000 m above sea level; d) an atmosphere not subject to excessive pollution by smoke, chemical fumes, salt laden spray, prolonged periods of high humidity or other abnormal condi
22、tions. 3 Definitions For the purposes of this British Standard the following definitions apply. 3.1 ceiling rose an accessory for connection to the fixed wiring of an installation to pass current to a lampholder or a luminaire by means of the conductors of a flexible cord 3.2 surface-type ceiling ro
23、se a ceiling rose provided with a seating surface such that when mounted as intended it projects wholly outside the surface on which it is mounted 3.3 semi-recessed or flush-type ceiling rose a ceiling rose intended for mounting with its base partially or completely sunk into a box complying with BS
24、 31, BS 4568-2, BS 4607-5 or BS 4662 3.4 terminal housing that part of the ceiling rose which locates and separates the terminals NOTEThe terminal housing may, or may not, be integral with the base. 3.5 terminal a means by which the user can make an electrical connection between the appropriate cabl
25、e or flexible cord and the conducting parts of the accessory without the use of special tools 3.6 screw-type terminal a terminal in which the connection is made directly or indirectly by means of screws or nuts of any kind NOTEThe following are examples of screw-type terminals. a) A pillar terminal
26、is a terminal in which the conductor is inserted into a hole or cavity, where it is clamped under the shank of the screw or screws. The clamping pressure may be applied directly by the shank of the screw or through an intermediate member to which pressure is applied by the shank of the screw. b) A s
27、crew terminal is a terminal in which the conductor is clamped under the head of the screw. The clamping pressure may be applied directly by the head of the screw or through an intermediate part, such as a washer, clamping plate or anti-spread device. c) A stud terminal is a terminal in which the con
28、ductor is clamped under a nut. The clamping pressure may be applied directly by a suitably shaped nut or through an intermediate part, such as a washer, clamping plate or anti-spread device. 3.7 screwless terminal a connecting terminal for the connection and subsequent disconnection of one conductor
29、 or the dismountable interconnection of two or more conductors capable of being dismantled, the connection being made, directly or indirectly, by means of springs or wedges, eccentrics or cones, etc. 3.8 load terminals terminals intended to accommodate flexible conductors for the connection of a lam
30、p load, via a lampholder or luminaireBS67:1987 2 BSI 09-1999 3.9 supply terminals terminals intended to accommodate conductors of the fixed wiring 3.10 loop terminal a supply terminal intended for the interconnection of live conductors without the provision for the connection of flexible cords 3.11
31、cover that part of the external enclosure which is intended to be removed to gain access for installation purposes 3.12 live parts current carrying parts, and those metal parts in contact with them during normal use NOTEEarthing terminals are not considered to be current carrying parts. 3.13 rated c
32、urrent the maximum load, in amperes, which may be connected to the load terminals 3.14 type test a test, or a series of tests, conducted on a sample, consisting of one or more similar items, to determine whether or not ceiling roses, manufactured to the same design as the sample, are capable of meet
33、ing the requirements of the specification 4 General requirements Ceiling roses shall be so designed and constructed that when installed in the proper manner and in normal use they function reliably and cause no danger to persons or surroundings. Ceiling roses shall be capable of meeting all the rele
34、vant requirements and tests specified herein. NOTEWhere tolerances are not specified in this standard the values are to be regarded as nominal. 5 General conditions for type testing 5.1 All tests in this standard are type tests. 5.2 Unless otherwise specified in this standard ceiling roses shall be
35、tested as delivered and installed, as in normal use, at an ambient temperature of 20 5 C. 5.3 A total sample of nine ceiling roses shall be submitted to inspection and tests in the following order of clauses: a) three ceiling roses: clauses 4 to 13 and clauses19 and 20 (mainly inspection); b) three
36、ceiling roses: clauses 10 to 13, 14.3 to14.6 and clauses 16 and 19 (general tests); c) three ceiling roses: 14.1, 14.2 and clauses17, 18 and 21 (material tests). 5.4 If no ceiling rose fails in the tests specified in 5.3, then ceiling roses of that type shall be deemed to comply with this standard.
37、If one ceiling rose fails in any individual test, or series of tests, specified in 5.3 and that ceiling rose can be shown to be not representative of normal design or production, then a separate set of three ceiling roses shall be submitted to the relevant test or series of tests specified in 5.3. I
38、f no ceiling rose fails in this re-test then ceiling roses of that type shall be deemed to comply with this standard. If more than one ceiling rose fails in the tests specified in 5.3 then ceiling roses of that type shall be deemed not to comply with this standard. 6 Ratings 6.1 Ceiling roses shall
39、have a rated voltage of 250 V. 6.2 Ceiling roses shall have a rated current not exceeding 6A. 7 Classification Ceiling roses shall be classified as follows. a) According to the method of mounting as: 1) surface-type (see 3.2); or 2) semi-recessed or flush-type (see 3.3). b) According to load-support
40、ing capability (see13.5) as: 1) intended to support mechanical loads by means of a flexible cord complying with BS6500; 2) intended to support mechanical loads as nominated by the manufacturer in addition to those specified in 7 b) 1), by means other than a flexible cord. c) According to the current
41、-carrying terminal arrangement as: 1) having provision for the connection of switch wiring; or 2) having no provision for the connection of switch wiring. d) According to terminal type as: 1) having screw-type terminals; or 2) having screwless terminals; or 3) having a combination of both types of t
42、erminal.BS67:1987 BSI 09-1999 3 8 Marking and information 8.1 Ceiling roses shall be marked with the following information on their main part, or one of the parts fixed to it in normal use: a) rated voltage, i.e. 250 V; b) rated current, specified by the manufacturer; c) ceiling roses provided with
43、screwless terminals for installation wiring shall be marked “Not to be used in circuits with ratings exceeding 10 A”; d) name or trade mark of the manufacturer or responsible vendor; e) the number of this British Standard, i.e.BS67 1) . 8.2 When symbols are used, they shall be as follows: amperesA v
44、oltsV earth M or N NOTEIt is recommended that, where practicable, the symbolM should be used. For the marking of the rated current and rated voltage, figures may be used alone. The figure for rated current shall be placed before or above that for the rated voltage and separated from the latter by a
45、line, e.g. 6 A 250 V, or 6/250, or . 8.3 Where any terminal is provided for particular connection purposes there shall be marking to indicate its intended use, (e.g. LOOP). Such marking shall not be placed on screws, washers or other easily removable parts. 8.4 Marking shall be easily legible and du
46、rable. 8.4.1 Compliance shall be checked by inspection and by rubbing the markings for 15 s with a cloth soaked in water and again for 15 s with a cloth soaked in petroleum spirit. The marking shall remain legible. Markings produced by an engraving or moulding process are deemed to comply without te
47、st. 8.5 Ceiling roses classified in accordance with clause 7 b) 2) shall be provided with installation information regarding their safe working mechanical loads and the method of fixing to mounting surfaces. 8.5.1 Compliance shall be checked by inspection. 9 Dimensions 9.1 Semi-recessed or flush cei
48、ling roses shall be so designed that they can be fitted to the following relevant mounting boxes. a) For circular ceiling roses the box shall be as specified in BS 31, BS 4568-2 or BS 4607-5. b) For square ceiling roses the box shall be as specified in BS 4662 (UA1 size). 9.2 Surface mounting ceilin
49、g roses shall be provided with at least two holes of at least 5.0 mm diameter, to accommodate mounting screws. NOTEThe two holes should preferably be on nominal centres of50.8 mm or 60.3 mm. 10 Accessibility of live parts 10.1 Ceiling roses shall be so designed and constructed that when properly assembled, correctly wired and fitted with flexible cord and cover as in normal use, live parts are not accessible. 10.1.1 Compliance shall be checked by applying, with a force of 5 N, test pin I of BS 3042:1971 to all accessible parts of the ceiling rose
