Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:12v:p1
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 12V (pt 1/2)
Character Range: 89173–95676

12V  4.0 + d  14.5  2.0

d = nominal diameter of filament as stated by the manufacturer.
For standard filament lamps: a = 2.0 + d, k = 0.5

Test procedure and requirements

           1. The lamp is placed in a holder (socket) capable of being so rotated through 360 degrees about the reference axis and that the front elevation is seen on the screen onto which the image of the filament is projected. The reference plane on the screen should coincide with the centre of the lamp. The central axis sought on the screen should coincide with the centre of the lamp's length.

              2. Front elevation

    2.1 The projection of the filament shall lie entirely within the rectangle when the lamp is rotated through 360 degrees.

    2.2 The centre of the filament shall not be offset by more than the distance "k" from the central axis sought.
CATEGORY T4W

Sheet T4W/1

DIMENSIONS in mm                                                                                                        Filament lamps of   Standard
                                                                                                                        normal production   filament

min.                                                                                                                  nom.                  max.       lamp
                                                e                                                                     13.5                             15.0        16.5      15.0 +/- 0.3

Lateral deviation 1/                                                                                                                                   1.5         0.5 max.
                                                Beta                                                                                                   90 degrees
                                                                                                                                                                                90 degrees +/- 5 degrees

                                                Cap BA 9s in accordance with IEC Publication 61 (sheet 7004-14-7) 3/
                                                ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
Rated values                                                                                                          V                     6                      12        24                           12

W                                                                                                                           4               4
Test voltage                                                                                                          V                     6.75                   13.5      28.0
  Objective
  values
                                                                                                                      W                                4           5         4 at 13.5 V

+/- %                                                                                                                       10              10
Luminous                                                                                                                    35
flux lm +/- %                                                                                                               20
Reference luminous flux: 35lm at approx. 13.5V

    1/ Maximum lateral deviation of filament centre from two reciprocally perpendicular planes both containing reference axis and one containing axis of pins.
2/ See paragraph 3.5.3.
    3/ Over the entire length of the cap there must be no projections or soldering extending beyond the permissible maximum diameter of the cap.
CATEGORY W3W

Sheet W3W/1

DIMENSIONS in mm                                                                            Filament lamps of   Standard
                                                                                            normal production   filament

min.                                                                                       nom.                 max.       lamp
e                                                                            11.2                               12.7       14.2          12.7 +/- 0.3
Lateral deviation 2/                                                                                                       1.5           0.5max.
beta                                                                         - 15 degrees                       0 degrees  + 15 degrees
                                                                                                                                            0 degrees +/- 5 degrees

Cap W 2.1 x 9.5d in accordance with IEC Publication 61 (sheet 7004-91-3) 1/
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
Rated values                                                                 V             6                               12            24                              12

W                                                                                          5                        5
Test voltage                                                                 V             6.75                            13.5          28.0
Objective
values                                                                       W
                                                                             +/- %                              5          7             5 at 13.5V

                                                                             10                10
Luminous
flux lm +/- %                                                                              50

                                                                             20
Reference luminous flux: 50lm at approx. 13.5V

1/ The type is protected by patents; ISO/IEC conditions apply.
    2/ Maximum lateral deviation of filament centre from two reciprocally perpendicular planes both containing reference axis and one containing axis XX.
3/ See paragraph 3.5.3.
CATEGORY W5W

Sheet W5W/1

DIMENSIONS in mm                                                                           Filament lamps of   Standard
                                                                                           normal production   filament

min.                                                                                      nom.