Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:6v:p12
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 6V (pt 12/19)
Character Range: 155231–159501

the keys and the reference axis, whether a filament lamp complies with the requirements.

            Side elevation Front elevation

Reference  a    b    h     k
Dimension  3.5  3.0  11.9  1.0

 Test procedures and requirements.
      1. The filament lamp is placed in a holder capable of being rotated about its axis and having either a calibrated scale or fixed stops corresponding to the angular displacement tolerance limits. The holder is then so rotated that an end view of the filament is seen on the screen on to which the image of the filament is projected. The end view of the filament shall be obtained within the angular displacements tolerance limits.
      2. Side elevation
    The filament lamp placed with the cap down, the reference axis vertical end the filament seen end-on, the projection of the filament shall lie entirely within a rectangle of height "a" and width "b", having its centre at the theoretical position of the centre of the filament.
3.                   Front elevation
    The filament lamp placed with the cap down and the reference axis vertical, the filament lamp being viewed in a direction at right angles to the filament axis:

3.1.  The projection of the filament shall lie entirely within a rectangle of height "a" and               width "h", having its centre at the theoretical position of the centre of the filament.
3.2.  The centre of the filament shall not be offset by more than distance "k" from the  reference axis.
CATEGORY P27/7W
Sheet P27W/7W/1
a = major (high wattage) filament
b = minor (low wattage) filament

DIMENSIONS in mm                                           Filament lamps of   Standard
                                                           normal production   filament lamp

min.                                                       nom.                max.
e                                                                              27.9 3/                        27.9 +/- 0.3
f                                                                                             9.9             9.9                + 0

- 2
      Lateral deviation 2/                                                                    3/              0.0 +/- 0.4

x 4/                                                                           5.1 3/                         5.1 +/- 0.5

y 4/                                                                           0.0 3/                         0.0 +/- 0.5

beta                                                       75 degrees 3/       90 degrees     105 degrees 3/
                                                                                                              90 degrees +/- 5
                                                                                                              degrees
Cap W2.5x16q in accordance with IEC Publ. 61 (7004-104-1)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
      Rated values                                         V                   12                             12

W                                                          27                  7                              27                 7
      Test voltage                                         V                   13.5
Objective
values
                                                           Watts
                                                                               W              29.2            7.7                     29.2  7.7

at 13.5 V
+/-                                                        10                                 10
%
Luminous
flux                                                       lm                  475            36

+/-                                                        15
%
Reference luminous flux: 475 and 36lm at approx. 13.5V

    1/ The reference axis is defined with respect to the reference keys and is perpendicular to the reference plane.
    2/ Maximum lateral deviation of major (high wattage) filament centre from two mutually perpendicular planes both containing the reference axis and one containing axis through reference keys.
3/ To be checked by means of a box system, sheets P27W/2 & 3.
    4/ "x" and "y" denote the offset of the axis of the minor (low wattage)