① classified according to possible connections
- single-pole switch
- double-pole switch
- pole switches
- points-in-line switches
- dual-control switch
Public line of two-way switch
- disconnected position control switch
Dual controlled double-pole switch
Dual-control reversing switch (or switches)
Note 1): code similarities or differences of two or more switches can be mounted on the same base.
Note 2): there's a disconnect switch code is also applicable to the location of the button switches and instantaneous switching.