Document ID: chunk:federal_register_of_legislation:F2018C00339:body:0:p7
Version: federal_register_of_legislation:F2018C00339
Segment Type: other
Provision Reference: 
Character Range: 20475–23605

with an additional electric 'Control Line'. In both cases, the reference value (abscissa of the figures) will be the value of the transmitted pressure in the 'Control Line':
(a) For trailers equipped with a pneumatic 'Control Line' only, this will be the actual pneumatic pressure in the 'Control Line';
(b) For trailers equipped with an additional electric 'Control Line', this will be the pressure corresponding to the transmitted digital demand value in the electric 'Control Line', according to ISO 11992:2003 including ISO 11992-2:2003 and its Amd.1:2007.
         Trailers equipped with both pneumatic and electric 'Control Lines' shall satisfy the requirements of the figures related to both 'Control Lines'. However, identical braking characteristic curves related to both 'Control Lines' are not required.
6.6.                                    Each 'Unique' trailer 'Service Brake System' must be shown by either test in accordance with parts 9 and 12 or by the calculation based on data for 'Approved' components in part 17, to meet the requirements of clause 12.1.
6.7.                                    Except as set out in clause 6.10, each 'Axle Group' of the trailer must be equipped with an 'Antilock System' and/or a 'Variable Proportioning Brake System'; and
6.7.1.                              Where the 'Service Brake System' incorporates an 'Antilock System' the requirements of APPENDIX 1 must be met.
6.7.2.                              Notwithstanding clause 6.10, all trailers fitted with a rear tow 'Coupling' (equipped to tow another trailer which uses air at a positive pressure) must be fitted at the front and rear with an electrical connection suitable to connect to an 'Antilock System'. The connection must meet APPENDIX 1 clause 3 and must include a 'Control Line' and seven pin connectors.
6.8.                                    Trailers fitted with a 'Variable Proportioning Brake System' must have markings affixed in a visible position on the trailer in indelible form and containing the following information:
         6.8.1.                              Where the 'Variable Proportioning Brake System' consists of a device mechanically controlled by the suspension of the trailer, the useful travel (recommended units of mm) of the device between the positions corresponding to 'UTM' and 'GTM', as well as any further information to enable the setting of the device to be checked in service.
         6.8.2.                              Where the 'Variable Proportioning Brake System' consists of a device which modulates the air pressure in the brake transmission, the 'Axle' load(s) (recommended units of kg) corresponding to the 'UTM' and 'GTM' for the 'Axle(s)' which control(s) the device and the corresponding nominal inlet and outlet pressures (recommended units of kPa) of the device, as well as any further information to enable the setting of the device to be checked in service. The inlet pressure must be not less than 80 per cent of the maximum design inlet pressure, as declared by the trailer manufacturer.
         6.8.3.                              Where the 'Variable