Generic version of lighting control with multiple locations, eliminates different kinds of switches, and to come to one standard version of lighting control, with intermediate switch
Fig. 1. The scheme of lighting control multiple switches
Fig. 2. The appearance of the switch
Universal circuit wiring lighting control with three or more parties, consists of one type of switches
Instead of double-pole switches on two areas SA1, SA3, we will supply intermediate the switch and use some contact with one side of the connection as shared, on the other hand two contacts which, when the switching switch power supply from one managed system to another.
Between them is mounted intermediate switch SA2, if he changes the switching connection circuit controllable lines without electrical discontinuity.
Due to the switches SA1, SA3 tearing feeding tube because towards each other and in one position closes a control line, an intermediate switch for changing the connection scheme is managed lines (phasing, polarity) in one position enables and disables the lamp EL1.
This scheme allows maintenance and repair organizations, to reduce the amount of wiring devices.
Publication: electro.narod.ru