BS EN 3660-063:2015 BSI Standards Publication Aerospace series — Cable outlet accessories for circular and rectangular electrical and optical connectors Part 063: Cable outlet, style K, straight, for heat shrinkable boot, shielded, sealed, selflocking for EN 3645 — Product standard BS EN 3660-063:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 3660-063:2015 It supersedes BS EN 3660-063:2009 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2015 Published by BSI Standards Limited 2015 ISBN 978 580 89594 ICS 49.060 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2015 Amendments/corrigenda issued since publication Date Text affected BS EN 3660-063:2015 EN 3660-063 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM November 2015 ICS 49.060 Supersedes EN 3660-063:2009 English Version Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 063: Cable outlet, style K, straight, for heat shrinkable boot, shielded, sealed, self-locking for EN 3645 - Product standard Série aérospatiale - Accessoires arrière pour connecteurs circulaires et rectangulaires électriques et optiques - Partie 063 : Raccord type K, droit, blindé, étanche, pour manchon thermorétractable, auto-freiné pour EN 3645 - Norme de produit Luft- und Raumfahrt - Endgehäuse für elektrische und optische Rund- und Rechtecksteckverbinder - Teil 063: Endgehäuse, Bauform K, gerade, für wärmeschrumpfende Bauteile, Schirmanschluss, abgedichtet, selbstsichernd für EN 3645 Produktnorm This European Standard was approved by CEN on June 2015 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref No EN 3660-063:2015 E BS EN 3660-063:2015 EN 3660-063:2015 (E) Contents Page European foreword Scope Normative references Terms and definitions Characteristics 5 Tests 11 Designation 18 Marking 18 Technical specification 18 BS EN 3660-063:2015 EN 3660-063:2015 (E) European foreword This document (EN 3660-063:2015) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN) After enquiries and votes carried out in accordance with the rules of this Association, this European Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflicting national standards shall be withdrawn at the latest by May 2016 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document supersedes EN 3660-063:2009 According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 3660-063:2015 EN 3660-063:2015 (E) Scope This European Standard defines a range of cable outlets, style K, straight, shielded, sealed, self-locking (anti-rotational), heat shrinkable boot, and / or metallic bands for use under the following conditions: Associated electrical connector(s) : EN 3660-002 Temperature range, Class F (N) : − 65 °C to 200 °C (see note above); : − 65 °C to 175 °C; NOTE Class N in EN 3660-001 cross refers to class F in EN 3660-063 Class K Class W Class T Class Z Associated electrical accessories : : : : − 65 °C to 200 °C; − 65 °C to 175 °C (Nickel PTFE plating); − 65 °C to 175 °C (Zinc Nickel plating) prEN 3660-033 Metallic band (for shield termination) These cable outlets are designed for termination of overall shielding braid and / or individual cable shields They accommodate/permit the termination of heat shrinkable boots Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies EN 2591- 1), Aerospace series — Elements of electrical and optical connection — Test methods EN 3645 (series), Aerospace series — Connectors, electrical, circular, scoop-proof, triple start threaded coupling operating temperature 175 °C or 200 °C continuous EN 3660-001, Aerospace series — Cable outlet accessories for circular and rectangular electrical and optical connectors — Part 001: Technical specification EN 3660-002, Aerospace series — Cable outlet accessories for circular and rectangular electrical and optical connectors — Part 002: Index of product standards prEN 3660-033, Aerospace series — Cable outlet accessories for circular and rectangular electrical and optical connectors — Part 033: Stainless steel banding band, style Z, for attachment of individual and/or overall screens to cable outlets — Product standard 2) EN 3909, Aerospace series — Test fluids and test methods for electric components and sub-assemblies EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529) DIN 82, Knurling 1) All its parts quoted in this European Standard 2) In preparation at the date of publication of this European Standard BS EN 3660-063:2015 EN 3660-063:2015 (E) Terms and definitions For the purposes of this document, the terms and definitions given in EN 3660-001 apply (Self-locking / anti-rotational definition) A self-locking or anti-rotational mechanism provides a nut rotation with a moderate torque in the mated direction and provides a greater torque in the unmated direction Characteristics 4.1 Dimensions and mass For dimensions and mass, see Figures and and Tables to inclusive For cable entry dimensions, see 4.2 All dimensions are in millimetres Key O-Ring Thread C Marking Four tooling holes spaced 90° apart Ø 2,60, depth, 1,27 Straight knurl Pitch manufacturer’s option Number of teeth N RKV 08 DIN 82 Figure (Please note there may be crossover dependent on diameter and pitch.) Minimum penetration of Ø D from the front of serrations Break edge NOTE NOTE Cable outlets may be manufactured as cast, fabricated or machined (manufactures option) No sharp edges / burrs permissible on internal or external surfaces / joints Surface finish of 1,6 µm max on all internal surfaces Figure BS EN 3660-063:2015 EN 3660-063:2015 (E) Table — Fixed dimensions of shell ØA Shell size max C ØB Thread max E ØD 16,76 2,90 15,24 M12 × 1,0-6H0.100R 6,70 16,76 13 29,39 21,18 M18 × 1,0-6H0.100R 12,80 16,76 M25 × 1,0-6H0.100R 19,20 15 18,21 32,49 17 25,14 35,71 19 21 31,09 41,70 23 25 47,98 39,88 20 2,90 16,76 30,90 M37 × 1,0-6H0.100R 2,90 2,90 16,76 27,70 M34 × 1,0-6H0.100R 12 2,90 16,76 2,90 16,76 Number of teeth 2,90 2,90 16,76 24,60 M31 × 1,0-6H0.100R 36,90 16,76 21,40 M28 × 1,0-6H0.100R 34,06 44,91 16,00 M22 × 1,0-6H0.100R 28,12 38,50 9,90 M15 × 1,0-6H0.100R N 21,79 24,99 I max 09 11 Dimensions in millimetres 1,70 16 24 28 32 36 40 44 Table — Variable dimensions of wiring chamber Length code wiring chamber H Dimensions in millimetres J max A 27,10 C 40,10 B D 8,20 35,10 16,20 50,10 31,20 21,20 Table — Mass for classes F (N), W, T and Z (1 of 2) Shell size code 09 11 Nominal mass in grams A B C D E F G H J K L M Length code wiring chamber 10,7 11,3 — — — — — — — — — — A 11,9 12,5 — — — — — — — — — — C Cable entry – size code 11,4 12,7 12,4 13,4 14,0 15,2 12,0 13,3 — — — — 13,1 13,7 14,3 14,7 15,3 15,9 14,1 15,9 14,7 16,6 15,3 17,1 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — B — D — B — — — A C D BS EN 3660-063:2015 EN 3660-063:2015 (E) Table — Mass for classes F (N), W, T and Z (2 of 2) Shell size code 13 15 17 19 21 23 25 Nominal mass in grams A B C D E F G H J K L M Length code wiring chamber 14,5 14,9 15,3 16,1 16,6 17,2 — — — — — — A 16,5 16,9 17,4 18,1 18,7 19,2 — — — — — — C Cable entry – size code 15,7 18,1 17,8 19,3 20,3 22,2 20,0 21,8 23,0 25,2 21,2 23,2 24,4 26,9 25,7 28,0 29,4 32,3 27,1 29,6 31,2 34,4 33,1 35,9 37,7 41,3 16,2 18,5 18,2 19,7 20,7 22,6 20,5 22,3 23,4 25,6 21,6 23,6 24,8 27,3 26,1 28,4 29,8 32,7 27,5 30,0 31,6 34,8 33,5 36,4 38,1 41,7 16,6 18,9 18,6 20,1 21,1 23,0 20,9 22,7 23,8 26,0 22,0 24,0 25,2 27,7 26,5 28,8 30,2 33,1 27,9 30,4 32,0 35,2 33,9 36,8 38,5 42,1 17,3 19,6 19,0 20,5 21,4 23,3 21,2 23,0 24,1 26,4 22,4 24,4 25,6 28,1 26,9 29,2 30,6 33,4 28,3 30,8 32,4 35,6 34,3 37,1 38,9 42,4 17,9 20,2 19,2 20,8 21,7 23,6 21,5 23,3 24,4 26,7 22,6 24,6 25,9 28,4 27,2 29,4 30,9 33,7 28,5 31,1 32,7 35,9 34,5 37,4 39,2 42,7 18,4 20,7 — — 20,0 21,2 22,5 23,7 21,6 24,4 21,8 23,6 24,7 27,0 22,9 24,9 26,2 28,7 27,5 29,7 31,2 34,0 28,8 31,4 33,0 36,2 34,9 37,7 39,5 43,0 22,7 25,6 — — — — — — 23,0 24,0 25,9 27,0 24,8 28,1 23,5 25,5 26,7 29,2 28,0 30,3 31,7 34,6 29,4 32,0 33,5 36,7 35,4 38,3 40,0 43,6 25,8 29,2 24,9 26,9 28,2 30,6 — — — — — — — — — — — — — — 28,4 29,6 32,1 33,3 30,7 35,0 29,8 32,3 33,9 37,1 35,8 38,6 40,4 44,0 31,9 36,2 — — — — — — — — — — — — — — — — — — 30,3 31,3 34,5 35,4 32,9 37,7 36,4 39,2 41,0 44,5 33,8 38,6 — — — — — — — — — — — — — — — — — — — — — — 36,6 37,7 41,2 42,3 39,4 44,7 40,5 45,8 — B — D — B — — A C — D — B — — A C — D — B — — A C — D — B — — A C — D — B — — A C — D — B — — — A C D BS EN 3660-063:2015 EN 3660-063:2015 (E) Table — Mass for class K Shell size code 09 11 13 15 17 19 21 23 25 Nominal mass in grams A B C D E F G H J K L M Length code wiring chamber 26,9 28,5 — — — — — — — — — — A 31,9 33,6 — — — — — — — — — — D — C End-fitting – size code 28,7 29,8 31,0 33,5 35,0 38,1 35,9 39,0 41,0 44,9 42,9 46,7 49,1 53,9 48,2 52,8 55,6 61,3 52,1 57,1 60,2 66,5 62,0 67,8 71,4 78,5 66,1 72,5 76,5 84,5 78,6 85,8 90,2 99,1 30,3 31,4 — — — — 32,8 34,6 36,0 39,9 41,7 43,1 35,3 36,8 37,0 40,1 42,1 46,0 44,0 47,8 50,2 55,0 49,3 53,9 56,7 62,4 53,2 58,2 61,4 67,6 63,2 68,9 72,5 79,6 67,2 73,6 77,6 85,6 79,8 86,9 91,3 100,2 37,0 38,6 38,2 41,3 43,2 47,1 45,1 48,9 51,3 56,0 50,4 55,0 57,8 63,4 54,3 59,3 62,4 68,7 64,2 70,0 73,5 80,7 68,3 74,7 78,7 86,7 80,8 88,0 92,4 101,3 38,5 40,0 — — — — — — — — — — — — 40,1 41,6 43,0 49,0 50,6 51,9 43,2 45,1 46,0 49,8 52,2 57,0 51,4 55,9 58,7 64,4 55,2 60,3 63,4 69,7 65,2 70,9 74,5 81,7 69,2 75,6 79,7 87,7 81,8 88,9 93,4 102,3 44,7 46,7 46,8 50,6 53,0 57,7 52,1 56,6 59,4 65,1 55,9 60,9 64,1 70,3 65,9 71,6 75,2 82,3 69,9 76,3 80,3 88,4 82,5 89,6 94,1 103,0 46,1 48,1 — — — — — — — — — — 48,9 52,0 59,9 63,0 52,7 55,1 52,9 57,4 60,3 65,9 56,8 61,8 64,9 71,2 66,7 72,4 76,0 83,2 70,8 77,2 81,2 89,2 83,3 90,4 94,9 55,8 58,2 — — — — — — — — — — — — — — 56,1 58,8 69,1 71,9 60,6 63,4 58,3 63,3 66,4 72,7 68,2 74,0 77,5 84,7 72,3 78,7 82,7 90,7 84,8 91,9 96,4 103,8 105,3 63,4 66,2 62,1 67,1 70,2 76,5 — — — — — — — — — — — — — — — — — — — — — — 69,2 72,4 85,7 88,8 74,9 78,5 73,3 79,7 83,7 91,7 85,8 92,9 97,4 106,3 78,1 81,7 — — — — — — — — — — — — — — — — — — — — — — — — — — 74,7 77,0 93,1 95,5 81,1 85,1 87,3 94,4 98,8 107,7 83,4 87,5 87,7 94,8 99,3 108,2 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 90,7 97,8 102,3 111,2 — — — — B C A B — D — C — — A B — D — C — — — — — — A B D A B C — D — C — — A B — D — C — — — — — — A B D A B C — D — C — — — A B D BS EN 3660-063:2015 EN 3660-063:2015 (E) 4.2 Cable entry dimensions See Figure 2, Table Figure — Cable entry Table Cable entry size code A C ØB + 0,2 max 6,4 9,4 14,0 1,12 3,9 5,5 7,7 E 11,1 14,1 G 15,9 9,5 12,7 H 19,1 J 22,2 K 25,5 L M Bundle/cable diameter ± 0,3 11,0 F D ± 0,1 7,9 D ØC ± 0,1 4,7 B NOTE ØA Dimensions in millimetres 28,6 31,8 12,6 15,7 18,9 22,0 25,2 28,4 31,5 34,7 12,2 15,5 17,1 18,7 20,3 23,5 26,7 29,8 33,0 36,2 39,4 1,12 1,12 1,12 1,12 2,0 5,4 7,4 12,4 15,5 1,12 15,4 1,75 1,75 1,75 9,0 10,5 10,4 1,75 7,5 9,4 1,12 1,12 4,0 18,4 21,4 25,4 28,4 12,0 18,5 21,5 25,0 28,0 31,0 The cable entry shall be selected in accordance with the maximum diameter of the cable bundle 4.3 Associated connectors See EN 3660-002 BS EN 3660-063:2015 EN 3660-063:2015 (E) 4.4 Interface dimensions 4.4.1 Standard front interface See Figure and Table All dimensions are in millimetres Detail A Key See detail A Figure Table Shell size 13,56 10,8 20,57 16,9 10,57 13 16,58 15 17 19 21 23 25 ØB Ref 09 11 10 ØA Dimensions in millimetres 23,57 26,57 29,57 32,56 35,56 7,5 13,8 20,1 22,8 26,0 29,1 32,3 BS EN 3660-063:2015 EN 3660-063:2015 (E) 4.5 Material and finish NOTE Class N in EN 3660-001 cross refers to class F in EN 3660-063 Material/Finish Class F (N) : Aluminium/Nickel plated (see note above) Material/Finish Class W Aluminium/Olive drab cadmium plated Material/Finish Class K : Material Finish Class T : Material/ Finish Class Z 4.6 Assembly torque : : Stainless steel/Passivated Aluminium (Nickel PTFE plated) Aluminium/(Zinc Nickel plated) These torque values are intended for installation use only, see Table Table Shell size Assembly torque ± 0,56 Nm Class K Classes F (N), T, W and Z 09 6,33 4,52 13 12,20 4,52 17 13,11 11 15 19 21 23 25 8,59 13,11 13,11 15,37 15,37 15,37 4,52 4,52 4,52 4,52 9,04 9,04 9,04 Tests 5.1 Tests according to EN 2591-100 Test details to be in accordance with Table 8, EN 3660-001 and EN 2591-100 Qualification to be in accordance with EN 3660-001 11 BS EN 3660-063:2015 EN 3660-063:2015 (E) Table (1 of 5) EN 2591- Designation of the test Not applicable Applicable see EN 3660-001 Details 101 Visual examination X — 205 Housing (shell) electrical continuity X Cable outlet – connector connection 102 Examination of dimensions and mass X See 4.1 and 4.2 Class F (N): < 2,5 mΩ; Class T: < mΩ; < mΩ; Class W: < 10 mΩ; Class K: 212 Surface transfer impedance (from 100 MHz to GHz) a X Frequency MHz 0,1 10 30 100 212 Shielding effectiveness from 100 MHz to GHz Class F (N) Zt (mΩ) Classes W, T, Z Class K 10 20 15 30 10 10 20 20 20 40 40 80 Test mounting as per 5.2 and Figure The Zt values correspond to the total surface impedance of the assembly Test shall be achieved with a same size and class coupled connector EN 3645 series and accessory Use Table values for the assembly X Use Table values for the assembly Minimum attenuation Frequency Classes F (N), T, W and Z Class K MHz dB dB 200 88 100 300 400 800 000 12 < mΩ Class Z: 90 88 87 85 85 80 75 73 71 66 65 BS EN 3660-063:2015 EN 3660-063:2015 (E) Table (2 of 5) EN 2591214 Designation of the test Not applicable Lightning strike, current and voltage pulse Applicable see EN 3660-001 X Details Current pulse All classes Level D (10 kA Waveform 2) Use Table values for the assembly Refer to EN 3660-001 for detail of mounting method Housing shell continuity values to be measured between the receptacle flange and heat shrink boot groove on the backshell 301 305 Endurance at temperature Rapid change of temperature X It is acceptable for visual appearance to be affected where it is as a direct result of the test application After conditioning housing shell continuity values may increase 100 % from pre-tested values — X Salt mist − 65 30 − 65 K 200 − 65 X X Z 175 175 175 30 − 65 30 − 65 30 Cable outlet not fitted to a connector and suspended with non-metallic cord Duration: Class T Class Z X 30 See EN 3660-001 Class W Class K Sealing 200 °C Class F (N) N/A °C F (N) T 307 T1 −5 W Mould growth TB +5 Classes 306 TA 48 h 500 h 500 h 500 h 500 h After conditioning housing shell continuity values may increase 100 % from pre-tested values Test in accordance with EN 60529 – Rating IP67 Requirement Visually inspect for signs of moisture ingress 13 BS EN 3660-063:2015 EN 3660-063:2015 (E) Table (3 of 5) EN 2591- Designation of the test Not applicable 314 Immersion at low air pressure X 316 Ozone resistance X Fire-resistance X 315 317 318 402 Fluid resistance Flammability Shock Applicable see EN 3660-001 X X Details — Fluids as defined in EN 3909 — — X — Method A Severity: 300 Number of shocks: One in each direction in three (3) perpendicular axis, i.e six (6) shocks Use Table values for the assembly For mounting method, please refer to EN 3660-001 403 Sinusoidal and random vibration X When tested the connector accessories shall not be damaged, nor shall there be any loosening of parts during exposure to shock Monitoring discontinuity is not required Method B Figure and Table Level J Duration: Eight (8) hours at ambient temperature In each of three (3) axis and six (6) directions Use Table values for the assembly For mounting method, please refer to EN 3660-001 406 14 Mechanical endurance X When tested the connector accessories shall not be damaged, nor shall there be any loosening of parts during Vibration The coupling nut shall be within (+ 2,25/− 1,12) Nm of the initial value after vibration There shall be no reduction in the electrical continuity readings post vibration test 30 cycles, Method A BS EN 3660-063:2015 EN 3660-063:2015 (E) Table (4 of 5) EN 2591408 Designation of the test Not applicable Mating and unmating forces Applicable see EN 3660-001 X Details Method A Shell Size Values for test backshell alone Coupling Uncoupling Ratio Nm 09 11 13 15 17 19 21 23 25 420 Mechanical strength of rear accessories X max max 0,55 2:1 4:1 0,35 1,00 4:1 2:1 1,80 4:1 2:1 2,10 4:1 2:1 2,40 4:1 2:1 2,75 4:1 2:1 4:1 Record values of coupling torque Uncoupling torque shall have a minimum ratio: ≥ 2:1 with a maximum ratio of ≤ 4:1 Method Phase A Bending moment Classes F (N), T, W and Z Class K Nm Nm 6,20 6,80 11 10,20 14,70 15 22,60 33,90 13 20,30 17 28,20 19 31,60 21 33,90 23 X 4:1 2:1 1,45 09 Locking wire hole strength 4:1 2:1 1,30 Shell size 422 2:1 25 39,50 — 42,90 30,50 41,80 47,40 50,90 58,80 64,40 15 BS EN 3660-063:2015 EN 3660-063:2015 (E) Table (5 of 5) EN 2591423 Designation of the test Not applicable Accessory thread strength Applicable see EN 3660-001 Details X Shell size 5,64 16 GHz to 10 GHz under consideration 11,30 5,64 16,95 5,64 21 11,30 25 11,30 23 11,30 — 8,47 5,64 5,64 19 a Nm 13 17 X Nm 5,64 15 Magnetic permeability Class K 09 11 513 Classes F (N), T, W and Z 15,82 16,95 16,95 19,77 19,77 19,77 BS EN 3660-063:2015 EN 3660-063:2015 (E) 5.2 Special tests – Surface transfer impedance / shielding effectiveness set-up See Figure Key 50 Ω termination load Injection line Semi-rigid cable To signal generator N type connector 30 mm of 93 % minimum coverage braid to be terminated with a band strap to the backshell This braid will then be mechanically terminated and soldered to a suitable machined tubular interface which is fitted to N-type connector Machined interface adaptor (shielding tube) to terminate between the backshell and a suitable N-type connector To receiver Figure 17 BS EN 3660-063:2015 EN 3660-063:2015 (E) Designation EXAMPLE Description block CABLE OUTLET Identity block EN3660-063W13CBA Product standard Material/Finish (see 4.5) Shell size (see Table 1) Length code wiring chamber (see Table 2) End-fitting size code (see Table 5) No digit to indicate clicking anti-decoupling Add letter A to indicate (non-clicking anti-de-coupling) NOTE NOTE No gaps are required between sections in the part number when printed If necessary, the code I9005 shall be placed between the description block and the identity block Marking See EN 3660-001 and Figure Technical specification See EN 3660-001 18 This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution (BSI) BSI is the national body responsible for preparing British Standards and other standards-related publications, information and services BSI is incorporated by Royal Charter British Standards and other standardization products are published by BSI Standards Limited About us Revisions We bring together business, industry, government, consumers, innovators and others to shape their combined experience and expertise into standards -based solutions Our British Standards and other publications are updated by amendment or revision The knowledge embodied in our standards has been carefully assembled in a dependable format and refined through our open consultation process Organizations of all sizes and 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