BS G 194:1965

1 Scope
Section one: General requirements
2 General
3 Rating
4 Declarations
5 Marking
Section two: Particular requirements
6 Operation
7 Construction
8 Dimensions
9 Environmental requirements
Section three: Tests
10 General
Type Tests
11 Mechanical strength tests
12 Operating force test
13 Mechanical endurance tests
14 Voltage drop test
15 High voltage and insulation tests
16 Temperature rise test
17 Electrical endurance tests
18 Overload tests
19 Short-circuit test
20 Vibration test
21 Acceleration test
22 Climatic test
23 Lever bush sealing test
24 Switch sealing test
25 Explosion-proofness
26 Strip examination and report
Production tests
27 Markings and operation
28 Operating force test
29 Voltage drop test
30 High voltage and insulation tests
Quality tests
31 Selection of samples
32 Electrical endurance tests
33 Vibration test
34 Lever bush sealing test
35 Sealing test
36 Strip examination and report
Appendices
A Type test schedule
B Serviceability tests

Gives requirements for single-hole fixing, lever-operated manual switches for use in nominal 28 volt d.c. and 115/200 volt three-phase, 400 cycle a.c. systems in aircraft. One type are sealed, the other only at the lever entry. The former is suitable for higher altitude and wider temperature conditions. Includes type test schedule and serviceability tests.

This British Standard specifies the requirements for two classes of single-hole fixing, lever-operated manual switches for use in nominal 28 volt d.c. and 115/200 volt three-phase, 400 cycle a.c. systems in aircraft.

Class 1 switches are sealed and are suitable for higher altitude and wider temperature conditions than Class 2, which are sealed only at the lever entry.