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Heavy Duty Truck and Bus Electrical Circuit Performance Requirement for 12/24-Volt Electric Starter Motors

2024-03-22
CURRENT
J3053_202403
The recommended practice describes a design standard that defines the maximum recommended voltage drop of the starting motor main circuits, as well as control system circuits, for 12/24-V starter systems. The battery technologies used in developing this document include the flooded lead acid, gel cell, and AGM. Starting systems supported by NiCd, Lithium Ion, NiZn, etc., or Ultracaps are not included in this document. This document is not intended to be updated or modified to include starter motors rated at voltages above the nominal 24-V electrical system. The starter is basically an electrical-to-mechanical power converter. If you double the available battery power in, you double the peak mechanical power out and double the heat losses. This means that we have to pay special attention to how battery power changes when we change the battery voltage and the effects it may have in overpowering the cranking system.
Standard

Identification of Vehicles and Supply Equipment for Conductive AC Charging

2023-12-13
CURRENT
J3068/1_202312
This document is an optional addition to SAE J3068 that adds additional communications (using LIN-CP) between the EV and SE that provide capabilities valuable to commercial fleets. These include the ability of the EV and SE to exchange unique identifiers, to establish which EV is connected to which SE, and to specify requirements for the next trip.
Standard

Auxiliary Two-Conductor Electrical Power Connector for Truck-Trailer High-Power Jumper Cable

2023-09-20
WIP
J3082
This SAE Standard provides the minimum requirements for high-power, two-conductor jumper cable plug and receptacle for truck-trailer jumper cable systems. It includes the test procedures, design, and performance requirements. This document covers receptacles rated 12 VDC nominal and at more than 30 A (amperes) up to and including 150 A, and is intended for a single circuit with one power conductor and one common return conductor. Single-conductor high-current connectors are not recommended for future designs because of inadequate ground return through fifth wheel/king pin. Cable size selection is to be made by the vehicle OEM for specific applications and the specific voltage drop requirements of those applications.
Standard

Seven Conductor Cable for ABS Power - Truck and Bus

2023-09-18
WIP
J2394
This SAE Standard establishes the minimum construction and performance requirements for seven conductor 1/8 2/10 4/12 cable for use on trucks, trailers, and converter dollies for 12 VDC nominal applications. Where appropriate, the standard refers to two types of cables (Type F and S, described later in the standard), due to the variation in the performance demands of cables used in flexing and stationary applications. While the document’s title refers to ABS Power to differentiate the document from the SAE J1067 standard that it supersedes, the scope applies to both the primary green cable for powering ABS and lighting and the yellow auxiliary cable of the same construction.
Standard

Electric Vehicle Power Transfer System Using a Three-Phase Capable Coupler

2023-07-12
WIP
J3068
This document covers the general physical, electrical, functional, testing, and performance requirements for conductive power transfer to an electric vehicle using a coupler capable of, but not limited to, transferring three-phase AC power. It defines a conductive power transfer method including the digital communication system. It also covers the functional and dimensional requirements for the electric vehicle inlet, supply equipment connector, and mating housings and contacts. Moveable charging equipment such as a service truck with charging facilities are within scope. Charging while moving (or in-route-charging) is not in scope.
Standard

Voltage Regulation and Limits

2022-12-16
CURRENT
J3226_202212
This document defines the test procedures and performance limits of steady state and transient voltage characteristics for 12 V, 24 V, or 48 V electrical power generating systems used in commercial ground vehicles.
Standard

Electric Vehicle Power Transfer System Using a Three-Phase Capable Coupler

2022-07-26
CURRENT
J3068_202207
This document covers the general physical, electrical, functional, testing, and performance requirements for conductive power transfer to an electric vehicle using a coupler capable of, but not limited to, transferring three-phase AC power. It defines a conductive power transfer method including the digital communication system. It also covers the functional and dimensional requirements for the electric vehicle inlet, supply equipment connector, and mating housings and contacts. Moveable charging equipment such as a service truck with charging facilities are within scope. Charging while moving (or in-route-charging) is not in scope.
Standard

Primary 13 Conductor Electrical Connector (Plug and Receptacle) between Towing Vehicle and Trailer.

2022-07-07
WIP
J3285
This SAE document provides the minimum requirements for a 13-conductor cable plug and receptacle to support the 13-conductor jumper cable between the towing vehicle and trailer. The document also includes the test procedures, design and performance requirements for the plug and receptacle. This document shall be used in conjunction with SAE J3284. The specified 13-conductor plug and receptacle would be totally interchangeable with the current SAE J560 primary plug and receptacle, plus provide an additional 6 conductors for use in trailers incorporating advanced electronics or multivoltage applications. New tractors designed with the 13 conductor receptacle and 13 conductor tractor to trailer cable and plug assembly, would be compatible with old trailers (7 conductor receptacle) and new trailers (13 conductor receptacle).
Standard

Primary Single Phase Nominal 120 VAC Wiring Distribution Assembly Design—Truck and Bus

2022-06-22
CURRENT
J2698_202206
This SAE Recommended Practice covers the design and application of primary on-board wiring distribution system harnessing for surface vehicles. This document is intended for single phase nominal 120 VAC circuits that provide power to truck sleeper cab hotel loads so that they may operate with the main propulsion engine turned off. The power supply comes from alternative sources such as land-based grid power, DC-AC inverters and auxiliary power generators. The circuits may also provide power to improve vehicle performance through charging batteries or operating cold-weather starting aids.
Standard

13-Conductor Electrical Cable between Towing Vehicle and Trailer

2022-06-15
WIP
J3284
This SAE standard establishes the minimum construction and performance requirements for a combination cable consisting of 9 conductors and 2 twisted pairs for use on trucks, trailers, and dollies. The cable includes power, ground and 2 jacketed/unshielded twisted paired signal circuits. This standard will be used in conjunction with the SAEJ XXXX “13 Conductor Electrical Connector (Plug and Receptacle) between Towing Vehicle and Trailer”. The standard will also include the test procedures, design and performance requirements for the cable.
Standard

Circuit Breakers

2022-05-26
CURRENT
J553_202205
This SAE Standard defines the test conditions, procedures, and performance requirements for circuit breakers in ratings up to and including 200 A. The document includes automatic reset, modified reset, and manually reset types of circuit breakers for 12 VDC, 24 VDC, and 48 VDC electrical systems. Some circuit breakers may have dual voltage ratings (AC and DC); however, this document evaluates DC performance only.
Standard

Electric Power Take-Off Interface Requirements for Commercial Vehicles

2021-05-04
WIP
J3253
This SAE Recommended Practice document covers the general guidelines for conductive power transfer of high voltage Direct Current (DC) power between OEM commercial truck chassis electrical systems and electrically powered body accessory equipment. The OEM chassis can have an EV drive train or be a hybrid chassis with or without a connection for traditional mechanical PTO. The chassis can include use of range extension systems. Voltage levels are defined as greater than 60VDC and include typical EV chassis voltage ranges up to and including 1200VDC . It also covers the functional requirements for the connection systems, body builder communication modes including diagnostics, suggested operational modes, system interlocks and isolation management. The scope of the ePTO physical electrical connection will be limited to a recommendation of the interface concept, space claim and service features and will leave connector features and design open for future definition.
Standard

Cable Marking for Circuit Identification in Multi-Voltage Power Distribution Systems

2021-01-13
CURRENT
J3176_202101
This SAE Standard establishes the minimum circuit identification and requirements for Multi-Voltage Power Distribution Systems (MVPDS) for use on trucks and buses. A Multi-Voltage Power Distribution System is one that distributes two or three voltages, up to 60 VDC, to power the controls, instruments, and devices.
Standard

Auxiliary Power Unit Electrical Interface Requirements for Class Eight Trucks

2020-04-29
CURRENT
J2891_202004
This SAE Recommended Practice covers the design and application of a 120 VAC single phase engine based auxiliary power unit or GENSET. This document is intended to provide design direction for the single phase nominal 120 VAC as it interfaces within the truck 12 VDC battery and electrical architecture providing power to truck sleeper cab hotel loads so that they may operate with the main propulsion engine turned off.
Standard

Seven Conductor Cable - Truck and Bus

2020-02-25
CURRENT
J1067_202002
This SAE Standard establishes the minimum construction and performance requirements for seven conductor 1/8-1/10-5/12 cable for use on trucks, trailers and converter dollies for 12 VDC nominal applications. Where appropriate, the standard refers to two types of cables (Type F and S, described later in the standard), due to the variation in the performance demands of cables used in flexing and stationary applications.
Standard

Seven Conductor Cable for ABS Power - Truck and Bus

2020-02-25
CURRENT
J2394_202002
This SAE Standard establishes the minimum construction and performance requirements for seven conductor 1/8-2/10-4/12 cable for use on trucks, trailers, and converter dollies for 12 VDC nominal applications. Where appropriate, the standard refers to two types of cables (Type F and S, described later in the standard), due to the variation in the performance demands of cables used in flexing and stationary applications. While the document’s title refers to ABS Power to differentiate the document from the SAE J1067 standard that it supersedes, the scope applies to both the primary green cable for powering ABS and lighting and the yellow auxiliary cable of the same construction.
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