Document ID: chunk:federal_register_of_legislation:F2023C00165:reg:10
Version: federal_register_of_legislation:F2023C00165
Segment Type: reg
Provision Reference: reg 10
Character Range: 86009–88557

10                                                                  10
Luminous
flux lm +/- %                                                       45

20
Reference luminous flux: 45lm at approx. 13.5V

    1/ This dimension corresponds to the distance between two apertures of 3.5mm diameter each bearing against one of the caps.
    2/ The filament must be housed in a cylinder 19mm long co-axial with the filament lamp axis and placed symmetrically about the lamp centre. The diameter of this cylinder is for 6V and 12V filament lamps: d + 4mm (for standard filament lamps: d + 2mm) and for 24V filament lamps: d + 5mm, "d" being the nominal diameter of the filament as stated by the manufacturer.
    3/ The deviation of the filament centre from the centre of the lamp's length should not be more than +/-2.0mm (for standard filament lamps: +/- 0.5mm) measured in the direction of the reference axis.
4/ 4.5mm for 6V filament lamps.
5/ 16.5mm for 24V filament lamps.
CATEGORY C21W

Sheet C21W/1

Filament lamps for reversing lamps only

DIMENSIONS in mm                                                    Filament lamps of   Standard
                                                                    normal production   filament

min.                                                                nom.                max.       lamp
b 1/                                                                40.0                41.0       42.0  41 +/- 0.5
f 2/                                                                7.5                            10.5  8 +/- 1

Cap SV 8.5 in accordance with IEC Publication 61 (sheet 7004-81-4)
ELECTRICAL AND PHOTOMETRIC CHARACTERISTICS
Rated values                                                        V                              12                12

W                                                                                       21               21
Test voltage                                                        V                              13.5
Objective
values                                                              W
                                                                    +/- %                          25                25 at
                                                                                                                     13.5 V

                                                                    6                              6
Luminous
flux lm +/- %                                                                           460