In industrial applications, 3 and 4-way switches are used in stairway and hall lighting, stock rooms, warehouses, tunnels, air shafts, etc. Three and ... Make a wiring diagram of a stairway circuit controlled by two 3-way and six 4-way switches. 8.
|Title||:||Suggested related instruction for apprentices in electrical installation and practice for use in day and evening apprentice classes and occupational extension programs|
|Author||:||New York (State) Bureau of Industrial and Technical Education|