Document ID: chunk:federal_register_of_legislation:F2023C00136:reg:400:p1
Version: federal_register_of_legislation:F2023C00136
Segment Type: reg
Provision Reference: reg 400 (pt 1/14)
Character Range: 73251–76148

400                               ≤ 20

         For rear indicators, the clearance between the inner edges of the two illuminating surfaces shall be at least 180 mm on the condition that the prescriptions of paragraph 2.11. of this Regulation are applied even when the registration plate is mounted;
6.3.3.2. In height: not less than 350 mm nor more than 1,200 mm above the ground;
         6.3.3.3. In length: the forward distance between the centre reference of the rear indicators and the transverse plane, which constitutes the rearmost limit of the vehicle's over-all length, shall not exceed 300 mm.
        6.3.4. Geometric visibility
Horizontal angles:  20° inwards, 80° outwards.
Vertical angles:  15° above and below the horizontal.
However, where a lamp is mounted below 750 mm (measured according to the provisions of paragraph 5.7.), the downward angle of 15° may be reduced to 5°.
6.3.5. Orientation
The front direction indicators may move in line with the steering angle.
6.3.6. Electrical connections
Direction indicator lamps shall switch on independently of the other lamps. All direction indicator lamps on one side of a vehicle shall be switched on and off by means of one control.
6.3.7.  May not be "reciprocally incorporated" with any other lamp, except amber front position lamp.
6.3.8. "Operating" tell-tale
Mandatory. This may be optical or auditory or both. If it is optical, it shall be (a) flashing green lamp(s), which, in the event of defective operation of any of the direction indicators, is extinguished, remains alight without flashing, or shows a marked change of frequency.
6.3.9. Other requirements
The characteristics indicated below shall be measured with no other load on the electrical system than that required for the operation of the engine and the lighting devices. For all vehicles:
         6.3.9.1. The light flashing frequency shall be 90 ± 30 times per minute;
         6.3.9.2. The flashing of the direction indicators on the same side of the vehicle may occur synchronously or alternately;
         6.3.9.3. Operation of the light-signal control shall be followed within not more than one second by the appearance of the light and within not more than one-and-one half seconds by the first extinction of the light.
         6.3.9.4. In the event of failure, other than a short circuit, of one direction indicator lamp, the other(s) direction indicator lamp(s) indicating the same direction must continue to flash or remain alight, but the frequency in this condition may be different from that prescribed.
6.4. Stop lamp
6.4.1. Number
One or two approved as a category S1 device according to Regulation No. 7 or stop lamp according to Regulation No. 50.
Optional one approved as a category S3 device according to Regulation No. 7
6.4.2. Arrangement
No special requirement.
6.4.3. Position
         6.4.3.1. For category S1 device specified in