Document ID: chunk:federal_register_of_legislation:F2023C00228:front:0:p73
Version: federal_register_of_legislation:F2023C00228
Segment Type: other
Provision Reference: 
Character Range: 196371–199317

Annex 3, Figure 11, of this Regulation gives examples of arrangements of approval marks corresponding to that case.

       B. TECHNICAL REQUIREMENTS FOR HEADLAMPS [7/]

       5. GENERAL SPECIFICATIONS

       5.1. Each sample shall conform to the specifications set forth in paragraphs 6 to 8 below.

       5.2. Headlamps shall be so made as to retain their prescribed photometric characteristics and to remain in good working order when in normal use, in spite of the vibrations to which they may be subjected.

       5.2.1. Headlamps shall be fitted with a device enabling them to be so adjusted on the vehicle   as to comply with the rules applicable to them.  Such a device need not be fitted on components in which the reflector and the lens cannot be separated provided the use of such components is confined to vehicles on which the headlamp setting can be adjusted by other means.  Where a headlamp providing a driving beam and a headlamp providing a passing beam, each equipped with its own filament lamp, are assembled to form a composite unit, the adjusting device shall enable each optical system individually to be duly adjusted.  However, this shall not apply to headlamp assemblies whose reflectors are indivisible.  For this type of assembly, the requirements of paragraph 6 shall apply.

       5.3. The components by which the filament lamp(s) is/are fixed to the reflector shall be so made that, even in darkness, the filament lamp(s) can be fixed in no other position but the correct one.[8/]

       The filament lamp-holder shall conform to the dimensional characteristics as given in the following data sheets of IEC Publication 61-2:

Filament lamps  Holder   Data Sheets
H               P14.5s   7005-46-3
H2              X5111    7005-99-2
H3              PK22s    7005-47-1
HB3             P20d     7005-31-1
HB4             P22d     7005-32-1
H7              PX26d    7005-5-1
H8              PG17     7005-110-1
HIR1            PX20d    7005- ... -1
HIR2            PX22d    7005- ... -
H9              PGJ19-5  7005-110-1

       5.4. Headlamps designed to satisfy the requirements of both right-hand and left-hand traffic 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 either the optical unit at a given  angle on the vehicle or the filament lamp at a given angle in relation to the optical unit.  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 inadvertently shifting of the headlamp from one position to the other or its setting in an intermediate position.  Where two different setting positions are provided for the filament lamp, the components attaching the filament lamp to the reflector must be so designed and made