Specification for aircraft lampholders

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

17-01-1966

Publisher

British Standards Institution

Gives the performance and quality requirements for bayonet lampholders for aircraft lamps having single centre contact (B 15s) and miniature centre contact (BA 9s) caps, used in atmospheric pressures down to 522 millimetres of mercury (an altitude of 10,000 ft (3048 m)). Suitable for systems of nominal voltages subject to individual maximum limitations, which apply independently B 15s: 2 amp, 250 V r.m.s. a.c., 60 watts, or BA 9s: 1 amp, 50 V r.m.s. a.c., 10 watts. The latter may be used on nominal system voltages up to 200 V r.m.s a.c., subject to a series ballast resistor being connected externally to the lampholder centre contact.

This British Standard specifies the performance and quality requirements for bayonet lampholders for aircraft lamps having single centre contact (B 15s) caps and miniature centre contact (BA 9s) caps, intended for use in atmospheric pressures down to 522 millimetres of mercury [equivalent to an altitude of 10 000 ft (3048 m)]. The lampholders are suitable for use on systems of nominal voltages up to 28 volts; they may be used on other nominal voltages subject to the following individual maximum limitations, which apply independently of each other:

B 15s: 2 amp, 250V r.m.s. a.c., 60 watts.
BA 9s: 1 amp, 50V r.m.s. a.c., 10 watts.

Although BA lampholders are not recommended for general use in circuits operating at more than 50 volts, with neon indicator lamps BA 9s lampholders may be used on nominal system voltages up to 200V r.m.s. a.c., subject to a series ballast resistor being connected externally to the centre contact of the lampholder.

Outline drawings of preferred lampholders are shown, but these are not intended to restrict the development of types offering alternative installational facilities such as batten mounting.

Committee	ACE/6
DevelopmentNote	Reviewed and confirmed by BSI, December 2012. (11/2012)
DocumentType	Standard
Pages	10
PublisherName	British Standards Institution
Status	Current

BS 2G 100-2:1962	Specification for general requirements for electrical equipment and indicating instruments for aircraft Environmental and operating conditions
BS 2G 100-3:1968	General requirements for aircraft electrical equipment and indicating in struments Characteristics of aircraft electrical systems