Document ID: chunk:federal_register_of_legislation:F2025C00108:front:0:p16
Version: federal_register_of_legislation:F2025C00108
Segment Type: other
Provision Reference: 
Character Range: 45089–49096

the design must be such that all the 'Brake Power Unit 35/...' are preferentially charged to an energy level of not less than 0.69 'E' (450 kPa).
 5.                               In the case of 'Service Brake Systems' incorporating 'Brake Power Unit 35/...' the design must be such that all 'Brake Power Unit 35/...' must preferentially service the brake system if the energy level falls below 0.69 'E' (450 kPa).
 1.                                     Electrical supply for trailer brake systems
     1.                               Each vehicle equipped to tow a trailer with an 'Aggregate Trailer Mass (ATM)' greater than 4.5 tonnes, must meet the requirements of APPENDIX 4 and clause 5.8.1.1.

 1.                         The continuous current capacity of the electrical conductive material between each contact of each ISO 7638 connector[2],[3] and its current source (or return/ground) must be at least the following:
           Vehicle designed to tow a single trailer only  Vehicle designed to be used in 'B-Double' and/or 'Road Train' combinations
           12 volt connector                              24 volt connector                                                           12 volt or 24 volt
                                                                                                                                      connector
Contact 1  20 amps                                        10 amps                                                                     20 amps
Contact 2  4 amps                                         2 amps                                                                      4 amps
Contact 3  6 amps                                         3 amps                                                                      6 amps
Contact 4  20 amps                                        10 amps                                                                     20 amps
Contact 5  2 amps                                         1 amp                                                                       2 amps

 1.                               Each vehicle designed to be used in 'Road Train' combinations, must be equipped with a special connector conforming to ISO 7638‑1:2003 together with a permanent electrical supply system configured for 24-volt operation.[4]
 1.                                     Illumination of stop lamps
     1.                               Activation of the 'Service Brake System' by a driver 'Control' must generate the signal necessary to illuminate the stop lamps.
     2.                               Activation of the 'Service Brake System' by 'Automatically Commanded Braking' must generate the signal necessary to illuminate the stop lamps. However, this signal may be suppressed when the retardation generated is less than 0.7 m/s2.
     3.                               Activation of only part of the 'Service Brake System' by 'Selective Braking' must not generate the signal which illuminates the stop lamps (note: during a 'Selective Braking' event, the function may change to 'Automatically Commanded Braking').
     4.                               In the case of vehicles equipped with an electric 'Control Line', the signal necessary to illuminate the stop lamps must be generated by the vehicle when a message "illuminate stop lamps" is received via the electric 'Control Line'.
     5.                               A vehicle that utilises electronic signalling to control initial application of the 'Service Brake System' (including for example by 'Automatically Commanded Braking' and/or 'Selective Braking'); and is equipped with an 'Endurance Braking System' and/or an 'Electric Regenerative Braking System of Category A'; must also meet the requirements of APPENDIX 5.

 1.                                           PERFORMANCE REQUIREMENTS
     1.                                     The vehicle must be capable of meeting the range of performance tests set out in Table 1, or as an alternative