1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2742_201304 SURFACE VEHICLE STANDARD J2742 APR2013 Issued 2013-04 Combination 11
5、 Conductors and 4 Pairs ECBS Cable RATIONALE This document has been developed concurrently with the SAE J2691 “15 Pole Connector Between Towing Vehicles and Trailers with 12 volt Nominal Supply” Standard. The cable and connectors provide the system for conveying power, ground and signal to support t
6、he trailer ECBS (Electronically Controlled Braking System) and anticipated, mid-term future requirements. In addition the system will meet all the requirements of the SAE J2394/J560 system since the new cable must be compatible with non-ECBS trailers. The system is being designed with improved perfo
7、rmance characteristics, both environmental and electrical, when compared to the 7-circuit system. As the truck trailer industry moves towards more advanced electronic systems, the connector in this standard would become more and more dominant. Over a period of time, the SAE J560 connector would no l
8、onger be used and the connector in this standard would be the single connector interfacing towing and towed ECBS equipped vehicles. 1. SCOPE This SAE standard establishes the minimum construction and performance requirements for a combination cable consisting of 11 conductors and 4 twisted pairs for
9、 use on trucks, trailers, and dollies in conjunction with SAEJ2691. (15 pole connectors.) The cable includes both power and unjacketed SAE J1939-15 paired signal circuits along with dual ground wires to accommodate grounding requirements within the constraints of the SAE J2691 terminal capacity. 2.
10、REFERENCES 2.1 Applicable Documents The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. SAE J2742 Issued APR2013 Page 2 of 112.1.1 SAE Publications Available from SAE International,
11、 400 Commonwealth Drive, Warrendale, PA 15096-0001 0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J560 Seven Conductor Electrical Connector for Truck-Trailer Jumper Cable SAE J1128 Low Tension Primary Cable SAE J1939-15 Reduced Physical Layer 250K bit
12、s/sec, UN-Shielded Twisted Pair (UTP) SAE J2394 Seven Conductor Cable for ABS Power - Truck and Bus SAE J2691 15 Pole Connector Between Towing Vehicles and Trailers with 12 Volt Nominal Supply - Truck and Bus 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box
13、C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM B 3 Specification for Soft or Annealed Copper Wire ASTM B 33 Specification for Tinned Soft or Annealed Copper Wire for Electrical Purposes ASTM B 117 Method of Salt Spray (Fog) Testing ASTM B 172 Specification for Rope Lay
14、 Stranded Copper Conductors Having Bunch-Stranded Members for Electrical Conductors ASTM B 174 Specification for Bunch-Stranded Copper Conductors for Electrical Conductors ASTM B 263 Standard Test Method for Determination of Cross-Sectional Area of Standard Conductors ASTM D 412 Standard Test Method
15、s for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers - Tension ASTM D 573 Standard Test Method for Rubber-Deterioration in an Air Oven ASTM D 4060 Standard Test Method for Abrasion Resistance of Organic Coatings. ASTM E 145 Standard Specification for Gravity-Convection and
16、Forced-Ventilation Ovens 2.1.3 UL (UNDERWRITERS LABORATORY) Publications Available from Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096, Tel: 847-272-8800, . UL 1581 Reference Standard for Electrical Wires, Cables, and Flexible Cords-Section 593. 2.2 Related Publication
17、s The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. SAE J2742 Issued APR2013 Page 3 of 112.2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001 0001, Tel: 877-606-7323 (i
18、nside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1939 Recommended Practice for a Serial Control and Communications Vehicle Network SAE J2174 Heavy-Duty Wiring Systems for Trailers 2032 mm or More in Width SAE J2202 Heavy-Duty Wiring Systems for On-Highway Trucks SAE J2222 Coile
19、d Electrical Cable - Truck and Bus 2.2.2 ISO Publications Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 4141-1,2,3,4 Multi-Core Connecting Cables (Parts 1 through 4) 3. TERMS AND DEFINITIONS 3.1 FLEXING Descri
20、bes a condition where the cable is installed in an unsupported way over a distance of greater than 0.5 m (18 in) and/or where there is a reasonable likelihood that the cable will be subjected to bending, longitudinal extension, or significant movement. As an example all cables connecting the tractor
21、 to trailer or dolly to trailer are to be considered flexing cables. 3.2 STATIONARY Describes a condition where the cable is installed in a fashion where its weight is supported within a distance of 0.5 m (18 in) or less, and where there is little likelihood of flexing as described above. An example
22、 of a stationary application is cable that is connected with clamps to a trailer chassis. 3.3 CONDUCTOR The current carrying element(s) in a cable comprised of a series of copper strands twisted together. 3.4 STRAND The solid component members of a conductor. 3.5 LAY The measure along a single plane
23、, between an individual strand or series of copper strands or insulated conductors starting and ending points in a complete spiral wrap around the grouping of which it is a part. 3.6 INSULATION The material applied to the conductor to provide electrical insulation and a level of mechanical protectio
24、n. 3.7 CABLE CORE The grouping of insulated conductors twisted together. SAE J2742 Issued APR2013 Page 4 of 113.8 JACKET The outer sheath applied to the cable core to maintain inner conductor positioning and to enhance the mechanical strength and durability of the cable. 4. TYPES Due to the variatio
25、n in the performance demands of cables used in different applications within the truck-trailer system, this document addresses two types of cables, determined by their mode of installation. 4.1 Type F - Flexing Pertains to cables that are subjected to flexing as defined in 3.1. 4.2 Type S - Stationa
26、ry Pertains to cables that are stationary as defined in 3.2. 5. IDENTIFICATION CODE DESIGNATION Cable conforming to this document shall be identified with the manufacturers identification, and shall be identified with SAE J2742 and the revision (month and year) of this document along with the cable
27、type as described in this document. For example: XYZ Corp. SAE J2742 (mo/yr) - Type S (or F). 6. TECHNICAL REQUIREMENTS 6.1 Conductors 6.1.1 Material All conductors shall be stranded, soft-annealed copper, complying with ASTM B 3, and ASTM B 174-Class K (Type F) and (Type S). Strands may be uncoated
28、 or may be tin coated complying with ASTM B 33. Conductors must be of a uniform diameter that achieves the area as required in 6.1.2. 6.1.2 Cross-Sectional Area The cross-sectional area of stranded conductors shall not be less that the values specified in Table 1. The cross-sectional area may be ver
29、ified by measuring actual strand sizes or by using the weight method in ASTM B 263 with a calculated factor to allow for the twist loss. 6.1.3 Stranding The individual strands contained within a conductor shall be of the same nominal diameter. The minimum number of strands per wire size for the two
30、types of cable covered by this document, are as shown in Table 1. 6.1.4 Strand Lay The maximum acceptable lay of strands for each wire size, regardless of the number of strands in the conductor, is as shown in Table 1. 6.1.5 Conductor Splicing When agreed between the supplier and purchaser, splices
31、may be used for the individual strands or for the conductor as a whole, provided that they are made in a workmanlike manner as described in ASTM B 174, and that they fulfill the following criteria: SAE J2742 Issued APR2013 Page 5 of 116.1.5.1 The break strength shall not be reduced by more than 20%.
32、 6.1.5.2 The resistance shall not be increased. 6.1.5.3 The diameter of the splice must not exceed the diameter of the uninsulated strand or conductor being spliced by more than 20%. 6.1.5.4 Single strand splices are not to be closer together than two lay lengths in a bunched or concentric stranded
33、conductor and twenty lay lengths in a rope-lay construction and there shall be no more than three single strand splices per 3 m of conductor. 6.1.5.5 Whole conductor splices are not to be closer together than twenty conductor lay lengths in the cable core and there shall be no more than three whole
34、conductor splices per 100 m of cable. TABLE 1 - CONDUCTORS SAE Wire Size mm2 METRIC Min. Cond. Area mm2 Max. Strand Lay Length mm Type F (Flexing) Min. Strands Type S (Stationary) Min. Strands SAE Wire Size No. ENGLISH Min. Cond. Area cir mils Max. Strand Lay Length Inches 0.8 3 5 0.81 3.31 5.26 31.
35、75 50.8 63.5 16 65 104 16 19 19 18 12 10 1588 6530 10 380 1.25 2.00 2.50 NOTES: 1. English units are not direct conversions from metric. 2. The metric wire size is the approximate nominal area of the conductor. 3. The SAE wire size number indicates that the cross-sectional area of the conductor appr
36、oximates the area of the American Wire Gauge for the equivalent size. 6.2 Insulation 6.2.1 Material Physical Properties Insulation material must be rated for a minimum of 90 g113C considering the expected buildup of heat associated with added circuits. The unaged physical properties of insulation ma
37、terial, tested in accordance with the method identified in ASTM D 412 at room temperature (23 g113C g114 5 g113C) shall be a minimum of the following values: 6.2.1.1 Minimum tensile strength of 10 MPa (1500 psi) 6.2.1.2 Minimum elongation of 150% 6.2.1.3 An accelerated aging test shall be conducted
38、in accordance with ASTM D 412, D, for 168 h in an air circulating oven at temperature of 120 C 5 C. After aging, the tensile strength shall not be less than 80% of the unaged test value and the elongation shall not be less than 50% of the unaged test value. 6.2.2 Application Insulation shall be homo
39、geneous and shall be placed concentrically within commercial tolerances about the conductor. Insulation shall adhere closely to, but strip readily from the conductor leaving it reasonably clean and in suitable condition for termination. 6.2.3 Insulated Conductor Outside Diameter The outside diameter
40、 of each insulated conductor shall be measured in accordance with SAE J1128. The mean of the diameter readings shall determine the finished insulated conductor diameter and shall be no greater than the maximum values shown in Table 2. SAE J2742 Issued APR2013 Page 6 of 116.2.4 Wall Thickness The min
41、imum wall thickness shall be measured using the method outlined in SAE J1128. All individual wall thickness values must be in accordance with those listed in Table 2. 6.2.5 Dielectric Voltage Withstand Test This test is only practical for use by manufacturers of the wire or cable. Refer to 6.2.6 for
42、 an alternate test for use by those wishing to test conductors before installation or use in harness assemblies. Unless otherwise specified, all specimens shall be the entire length of wire conductors subjected to continuous spark testing with voltage set at 1500 V AC. 6.2.5.1 Apparatus 6.2.5.1.1 Sp
43、ark Tester A transformer of sufficient capacity to maintain the test voltage specified in the detailed specification under all normal conditions of leakage current shall be used. The core of the transformer and one end of the secondary winding shall be connected to ground. A voltmeter shall be so lo
44、cated in the circuit that it will indicate at all times the actual test voltage applied. The spark tester shall not be simultaneously connected to more than one electrode. 6.2.5.1.2 Electrode An electrode which makes direct mechanical contact with the surface of the insulation of the wire or cable u
45、ndergoing test shall be used. A pipe, coiled spring or the like shall not be acceptable. If the link bead-chain type of electrode is used, the bottom of the metal electrode enclosure shall be “V”-shaped. The chains shall have a length appreciably greater that the depth of the enclosure. The width of
46、 the trough shall be approximately 38 mm (1.5 in) greater than the diameter of the largest wire or cable to be tested. If a bead-chain type of electrode is used, the beads shall have a diameter of 5 mm (3/16 in). The longitudinal spacing of the chains shall not be more than 13 mm (1/2 in). The trans
47、verse spacing of the chains shall not be more than 9.5 mm (3/8 in), except that the spacing may be 13 mm (1/2 in) if the transverse rows of chain are staggered. The electrode shall be provided with a grounded metallic screen or the equivalent as a guard against contact by personnel. The length of th
48、e electrode shall be sufficient to meet the requirements in 6.2.5.2. 6.2.5.1.3 Fault Signaling Device A fault signaling device or system shall include a visible signal, a defect recording device, and/or an automatic stop device. The arrangement shall operate in such a way that when the fault signal
49、is given, it will be maintained until manually reset. 6.2.5.2 Procedure The spark test shall be conducted as near to the end of the manufacturing process as is practicable. The test voltage shall be as specified in the detailed specification. The specimen shall be attached to the electrode and the electrode connected to one lead of the transformer secondary. Both ends of the conductor of the specimen, the other secondary lead an
