BRITISH STANDARD AUTOMOBILE SERIES BS AU 198 1984 Specification for Electrical connections between towing vehicles and trailers with 24 V electrical equipment type 24 S (supplementary) UDC 629 11 013[.]
Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BRITISH STANDARD AUTOMOBILE SERIES Specification for Electrical connections between towing vehicles and trailers with 24 V electrical equipment: type 24 S (supplementary) UD C 62 1 : 62 41 BS AU 98: 984 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 198:1984 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/- ) to Technical Committee AUE/1 upon which the following bodies were represented: Association of Trailer Manufacturers Department of Transport Electric Cable Makers’ Confederation National Caravan Council Limited Society of Motor Manufacturers and Traders Limited This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Board of BSI and comes into effect on Amendments issued since publication 31 January 984 Amd No © BSI 02- 2000 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment 79/721 84 DC ISBN 580 13549 Date of issue Comments Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 198:1984 Contents Page Committees responsible Foreword ii Scope General Performance Figure — Socket Figure — Plug Figure — Socket and plug assembly (free space) Table — Allocation of cable colours Publications referred to © BSI 02- 2000 Inside front cover Inside back cover i Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 98: 984 Fore word This British Standard has been prepared under the direction of the Automobile Standards Committee It specifies requirements for 24 V type S (supplementary) electrical connectors between towing vehicles and trailers and is based on “Road vehicles — Electrical connections between towing vehicles and trailers with 24 V electrical equipment — Type 24 S (supplementary)”, ISO 3731 : 980 published by the International Organization for Standardization (ISO) Connectors manufactured in accordance with this standard are interchangeable with those made in accordance with ISO 3731 , but the standards are not identical j This standard differs from ISO 3731 in that contact warning and contact f is designated as failure is designated as switched power supply, to make provisions for the method preferred in the United Kingdom for wiring trailer brake antilock systems Performance in accordance with BS AU 94 is also specified 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 C omp liance with a British S tand ard d oe s no t of itse lf confe r immunity from le gal ob ligatio ns S ummary of p age s This document comprises a front cover, an inside front cover, pages i and ii, pages to 4, 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 ii © BSI 02- 2000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 98: 984 Plug S cop e This British Standard specifies requirements for sockets and plugs of type 24 S which will permit electrical connections between towing vehicles and trailers with 24 V electrical equipment NOTE These sockets and plugs are not interchangeable with The plug shall be mounted on the trailer in the case of a road train and on the towing vehicle in the case of an articulated road train f k The plug shall be provided with six spring tubes e corresponding to pins pin ( ) to , and one contact f k type 24 N (normal) sockets and plugs (see BS AU 97) The internal diameter of tubes NOTE such that the corresponding pins of the socket can be The titles of the publications referred to in this standard are listed on the inside back cover Numb e r of co ntacts connected with a moderate push, but they shall There shall be seven contacts designated as follows: Each rear terminal shall be capable of receiving one conductor of mm minimum cross section The contact designations shall be permanently common return; marked on the terminal face in symbols not less failure warning; than mm high reversing light; NOTE power supply; from those indicated in Figure 2, provided that the specified pin sensing device with common return; switched power supply; rear fog light locations of the different functions are complied with All metallic parts of the plug shall be made of against corrosion The arrangement of contacts shall be as shown in Figure and Figure 2 S o cke t Means of fixing and sealing the cable shall be provided Allocation of cab le co lo urs The socket shall be mounted on the rear of the towing vehicle in the case of a road train It to the different circuits as shown in Table Tab le — Allocation of cab le colours an articulated road train e The socket shall be provided with six contact to e ) and one spring tube ( corresponding to pin of the plug ) All contacts shall be insulated NOTE After fitting, contact common return of the vehicle e may be connected to the The internal diameter of tube e shall be such that the corresponding pin of the plug can be connected with a moderate push, but it shall ensure a good electrical contact Each rear terminal shall be capable of receiving two conductors of mm minimum cross section The contact designations shall be permanently marked on the inside of the socket cover and on the terminal face in symbols not less than mm high NOTE These symbols, which need not be numbers, may differ from those indicated in Figure , provided that the specified pin locations of the different functions are complied with The socket shall be provided with a splashproof cover which shall close automatically when the plug is disengaged The hinged cover on the socket shall be provided with a locking lug to retain the plug when it is engaged All metallic parts of the socket shall be made of corrosion- resistant material or shall be protected against corrosion The cable colours of the seven- core connecting cable shall be allocated shall be mounted on the semi- trailer in the case of f k These symbols, which need not be numbers, may differ corrosion- resistant material or shall be protected Arrange me nt o f co ntacts pins ( shall be ensure a good electrical contact Ge ne ral e f g h i j k to C o ntact e f g h i j k C ab le C ircui t co lo u r Common return White Failure warning Black Reversing light Yellow Power supply Red Sensing device with common return Green Switched power supply Brown Rear fog light Blue D istinguishing marking A light and permanent colour shall be used for at least the insulating parts of the 24 S connector, to distinguish it from the 24 N connector NOTE BS AU 97 specifies that the 24 N connector is a dark and permanent colour, preferably black D ime nsions for so cke t and p lug The dimensions for the socket and plug shall be as shown in Figure and Figure The clearance dimensions around the socket and plug assembly shall be as shown in Figure The location of the socket and plug assembly on the towing vehicle shall be as in BS AU 95 Pe rformance The performance of connectors shall comply with BS AU 94 © BSI 02- 2000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 98: 984 All dimensions in millimetres NO TE The numbers designating contacts correspond to those given in Figure — S ocke t © BSI 02 - 000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 98: 984 All dimensions in millimetres NO TE The numbers designating contacts correspond to those given in NO TE For clarification of terminal numbering see Figure Figure — Plug © BSI 02 - 000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 98:1 984 Horizontal free space (see note) All dimensions in millimetres NOTE The angle of 45 ° max extends across the full horizontal free space Figure — Socket and plug assembly (free space) © BSI 02- 2000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 198:1984 Publications referred to BS AU 94, Specification for performance of electrical connections between towing vehicles and trailers BS AU 95, Specification for mounting electrical connections on rear cross members of towing vehicles BS AU 97, Specification for electrical connections between towing vehicles and trailers with 24 V electrical equipment: type 24 N (normal) Road vehicles — Electrical connections between towing vehicles and trailers with 24 V electrical equipment: type 24 S (supplementary)1 ) ISO 3731 , 1) Referred to in the foreword only © BSI 02 - 000 Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 01 : 57: 51 G M T+00: 00 2006, U n trol l ed Copy, (c) BSI BS AU 198: 1984 BSI — British Standards Institution BS I is the indep endent national b ody res p ons ib le for p rep aring Britis h S tandards It p res ents the UK view on s tandards in E urop e and at the international level It 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