BRITISH STANDARD AUTOMOBILE SERIES BS AU 197 1984 Specification for Electrical connections between towing vehicles and trailers with 24 V electrical equipment type 24 N (normal) UDC 629 11 013 5 621 3[.]
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 N (normal) UD C 62 1 : 62 41 BS AU 97:1 984 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 197:1984 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 © BSI 01 - 2000 The following BSI references relate to the work on this standard: Committee reference AUE/1 Draft for comment 74/77643 DC ISBN 580 13547 Amd No 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 197:1984 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 01 - 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 97 : 984 Fore word This British Standard has been prepared under the direction of the Automobile Standards Committee It specifies requirements for 24 V type N (normal) electrical connectors between towing vehicles and trailers and is based on ISO 1 85: 975 “Road vehicles — Electrical connections between towing vehicles and towed vehicles with 24 V electrical equipment — Type 24 N (normal)”, published by the International Organization for Standardization (ISO) Connectors manufactured in accordance with this standard are interchangeable with those made in accordance with ISO 1 85, but the standards are not identical This standard differs from ISO 1 85 in that there is an additional clause for mounting the socket and plug assembly, and that performance in accordance with BS 94 is 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 01 - 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 97: 984 All metallic parts of the socket shall be made of S cop e This British Standard specifies requirements for sockets and plugs of type 24 N which will permit electrical connections between towing vehicles and trailers with 24 V electrical equipment NOTE These sockets and plugs are not interchangeable with corrosion- resistant material or shall be protected against corrosion Plug 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 e f k type 24 S (supplementary) sockets and plugs (see BS AU 98) The plug shall be provided with six spring tubes NOTE corresponding to pins The titles of the publications referred to in this standard are listed on the inside back cover Numb e r of co ntacts There shall be seven contacts, designated as follows to shall be such that the corresponding pins of the socket can be connected with a moderate push, but they shall Each rear terminal shall be capable of receiving one left- hand rear position and end- outline conductor of mm marker light, and rear registration- plate minimum cross section The contact designations shall be permanently illuminating device; marked on the terminal face in symbols not less left- hand direction- indicator light; than mm high stop lights; NOTE These symbols, which need not be numbers, may differ from those indicated in Figure 2, provided that the specified pin e right- hand direction- indicator light; locations of the different functions are complied with right- hand rear position and end- outline It shall be impossible to connect pin marker light, and rear registration- plate k ensure a good electrical contact common return; g h i j and one larger The internal diameter of tubes Ge ne ral e f to spring tube corresponding to pin tubes illuminating device; f k to to any of the All metallic parts of the plug shall be made of braking control for trailers corrosion- resistant material or shall be protected The rear registration- plate illuminating device shall against corrosion be connected in such a manner that no lamp of such Means of fixing and sealing the cable shall be a device has a common connection with both provided contacts f and j Allocation of cab le co lo urs Arrange me nt o f co ntacts The arrangement of contacts shall be as shown in Figure and to the different circuits as shown in Table Figure Tab le — Allocation of cab le colours S o cke t The socket shall be mounted on the rear of the towing vehicle in the case of a road train It shall be mounted on the semi- trailer in the case of an articulated road train f k e The socket shall be provided with six contact pins ( to ) and one larger contact pin ( All contacts shall be insulated NOTE After fitting, contact common return of the vehicle e ) may be connected to the 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 The cable colours of the seven- core connecting cable shall be allocated 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 e f C o ntact g h i j © BSI 01 - 2000 White Left- hand rear position and end- outline marker light, and Black illuminating device Left- hand Yellow direction- indicator light Stop lights Red Right- hand Green direction- indicator light Right- hand rear position and Brown end- outline marker light, and rear registration- plate is disengaged The hinged cover on the socket shall when it is engaged Common return C ab le co lo ur rear registration- plate cover which shall close automatically when the plug be provided with a locking lug to retain the plug C i rcui t k illuminating device Braking control for trailers Blue 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 97 : 984 D istinguishing marking A dark and D ime nsions for so cke t and p lug The p ermanent colour, p referab ly b lack, shall b e us ed dimensions for the s ocket and p lug s hall b e as given for at leas t the insulating p arts of the N in Figure and Figure The clearance dimensions connector, to dis tinguish it from the S connector around the socket and p lug ass emb ly s hall b e as NO TE shown in Figure BS AU s p ecifies that the S connector is a light and p erm anent colour The location of the s ocket and p lug ass emb ly on the towing vehicle s hall b e as s p ecified in BS AU Pe rformance The connectors s hall comp ly with BS AU 94 All dimens ions in millimetres NO TE The numb ers des ignating contacts corres p ond to thos e given in Figure — S ocke t © BS I - 00 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 97: 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 01 - 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 97:1 984 All dimensions in millimetres NO TE The angle of 45 ° max extends across the full horizontal free space Figure — Socket and plug assembly (free space) © BSI 01 - 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 197:1984 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 98, Specification for electrical connections between towing vehicles and trailers with 24 V electrical equipment: type 24 S (supplementary) ISO 1 85, Road vehicles — Electrical connections between towing vehicles and towed vehicles with 24 V electrical equipment — Type 24 N (normal)1 ) 1) Referred to in the foreword only © BSI 01 - 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