This British Standard specifies the requirements for two basic sizes (A and B) of single-hole fixing, lever-operated manual switches for use in nominal 28 V d.c. and 115/200 V three-phase, 400 Hz a.c. systems in aircraft.
Two classes of environmentally sealed switches in each basic size are specified as follows.
Class 1. Switches suitable for high altitude and wide temperature conditions.
Class 2. Switches suitable for lower altitudes and narrower temperature conditions than class 1 switches.
BS G 224:1978 history
0000 BS G 224:1978(2000)
1978BS G 224:1978 Specification for lever-operated manual switches for aircraft
1967BS G 200:1967 Specification for miniature lever-operated manual switches
1965BS G 194:1965 Specification for lever-operated manual switches for aircraft