Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p43
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 115955–119029

source is used to provide the main beam the combined main-beam functions will be used to determine the maximum value of the illumination (E max).

       6.3. The terminals shall only be in electrical connection with the appropriate filament or filaments and shall be robust and firmly fixed to the unit.

       6.4. If the units are circular they shall provide all the physical features and electrical connections shown in one of the plates SB2 - SB7 in annex 4 and shall be made to the dimensions in that plate.

       6.5. SB units designed to meet the requirements both of countries where the traffic keeps to the right and of those where the traffic keeps to the left, may be adapted for traffic on a given side of the road either by an appropriate initial setting when fitted on the vehicle, or by selective setting by the user.  Such initial or selective setting may consist, for example, of fixing the angular setting of the unit on the vehicle.  In all cases, only two precise setting positions, one for right-hand and one for left-hand traffic, shall be possible, and the design shall preclude inadvertent shifting of the unit from the one position to the other or its setting in an intermediate position.  Conformity with the requirements of, this paragraph shall be verified visually and, where necessary, by a test fitting.

       6.6. Complementary tests shall be done according to the requirements of annex 5 to ensure that in use there is no excessive change in photo metric performance.

       6.7 If the lens of the headlamp is of plastic material, tests shall be done according to the requirements of annex 6.

       7. RATED VALUES

       7.1. The values of rated voltage are: 6, 12 and 24 volts[4/].

       7.2. The power consumed at the test voltage by any submitted SB unit shall not exceed    the rated wattage marked on the unit, by more than the percentage specified in table 1. No lower limit is specified for the tolerance on wattage but the minimum illumination values specified in table 2 of paragraph 8.8 must be obtained.

       Table 1

                            Circular units of 180 mm diameter      Circular units of 145 mm diameter
Rated voltage               6                                      12                                 6          12
Test voltage                6                                      12                                 6          12
                            Rated wattage and permitted tolerance
Double filaments[5/]        Driving beam                           60 + 0%                            37.5 + 0%
                            Passing beam                           50 + 0%                            50 + 0%
Driving beam filament only  75 + 0%                                50 + 0%
Passing beam filament only  50 + 0%                                50 + 0%

       8. ILLUMINATION [6/]

       8.1. SB units shall be so made as to give adequate illumination without dazzle for the passing beam, and good illumination for the driving beam.

       8.2. The illumination produced by