BS 3G 233:1990

Foreword
Committees responsible
Specification
1. Scope
2. Classification
3. Construction
4. Designation and marking
5. Packaging and labelling
6. Tests
7. Reference samples
Tables
1. Type 01, class 1: single-core unscreened inter-
     connect cables (135 deg C)
2. Type 01/EL, class 1: single-core unscreened inter-
     connect cables (135 deg C)
3. Type 02, class 1: single-core unscreened airframe
     cables (135 deg C)
4. Type 02/EL, class 1: single-core unscreened airframe
     cables (135 deg C)
5. Type 01, classes 2, 3 and 4: multi-core unscreened,
     twisted interconnect cables without jacket
     (135 deg C)
6. Type 01/EL, classes 2, 3 and 4: multi-core
     unscreened, twisted interconnect cables without
     jacket (135 deg C)
7. Type 02, classes 2, 3 and 4: multi-core unscreened,
     twisted airframe cables without jacket (135 deg C)
8. Type 02/EL, classes 2, 3 and 4: multi-core
     unscreened, twisted airframe cables without jacket
     (135 deg C)
9. Type 03, classes 2, 3 and 4: multi-core unscreened,
     twisted interconnect cables with jacket (135 deg C)
10. Type 04, classes 2, 3 and 4: multi-core unscreened,
     twisted airframe cables with jacket (135 deg C)
11. Type 05, classes 1,2 3 and 4: single-core screened
     with jacket and multi-core twisted and screened
     with jacket, interconnect cables (135 deg C)
12. Type 05/EL, classes 1, 2, 3 and 4: single-core
     screened with jacket and multi-core twisted and
     screened with jacket, interconnect/airframe cables
     (135 deg C)
13. Type 06, classes 1, 2, 3 and 4: single-core screened
     with jacket and multi-core twisted and screened with
     jacket, interconnect airframe cables (135 deg C)
14. Type 06/EL, classes 1, 2, 3 and 4: single-core
     screened with jacket and multi-core twisted and
     screened with jacket, airframe cables (135 deg C)
15. Conductor overall diameter for extra-lightweight
     cables
16. Colour of insulation of class 1 extra-lightweight
     cables
17. Colour of insulation of classes 2, 3 and 4 extra-
     lightweight cables
18. Cable tests and requirements: types 01, 01/EL, 02,
     02/EL
19. Cable tests and requirements: types 05, 05/EL, 06,
     06/EL
20. Cable tests and requirements: types 03 and 04
21. Test applications
22. Specific test parameters
23. Current ratings for general purpose 135 deg C
     airframe cable
Figure
1. Variation of resistance of copper with temperature

Includes an additional range of extra-lightweight insulated cables for general airframe or equipment interconnect use.

This British Standard specifies construction and performance requirements for a range of lightweight and extra-lightweight cables (designated/EL) with extruded insulation suitable for general airframe use in all sizes. The cables are also suitable for equipment interconnect use in the size ranges 26 to 18 (standard lightweight cable) and 24 to 14 (extra-lightlightweight cable).

The following types of cables are specified:

The cables are suitable for continuous use. where the maximum stabilized conductor temperature does not exceed 135 °C, and for applications involving flexing at temperatures down to – 65 °C.

The cables are suitable for use where the potential between conductors or between a conductor and screen, or the aircraft structure does not exceed 600 V r.m.s and the frequency does not exceed 2 000 Hz.

Interconnect cables are suitable for use in areas with some physical protection, such as behind panels or bulkheads, and may also be used as the basis for cables having additional protection such as a jacket or screen and jacket. They also have an application for the internal wiring of equipment.

Airframe cables are of sufficiently robust construction to be used for open aircraft wiring.

The continuous and short-term current ratings for the cables are specified in this standard.

NOTE 1 The titles of the publications referred to in this standard are listed on the inside back cover.

NOTE 2 The latest revision of an Aerospace Series standard is indicated by a prefix number.