A two way light switch is a simple single pole changeover switch with three terminals. In one switch position the com terminal is connected to l1.

Ll 6582 One Way Switch Wiring Diagram Light Schematic Wiring
Two gang one way switch diagram. You dont see these as much now days as many manufactures only make 2 gang 2 way light switches that serve the same purpose you just dont use the third l2 terminal on each gang however i thought we would include it just in case you come across one. Way in switch gang in switch and sp dp pole difference in electrical. This method is depicted in the diagram at the top of this post. A three conductor cable with a ground is then installed between the two 3 way switch boxes. 2 way switch 3 wire system new harmonised cable colours 2 way switching means having two or more switches in different locations to control one lamp. These are typically labelled com l1 and l2 some may label the l1 and l2 positions as 1 way and 2 way.
If you are going to install a new one then go for three wire control method. 2 gang switch wiring actual and schematic diagram. Connecting wires how to connect 2 way switch wiring using two wire control. I think that the most common method used to wire a set of 3 way switches is to bring the two wire line cable into one switch box and bring the two wire load cable into the other switch box. In the other switch position it changes over so that com is connected. They are wired so that operation of either.
This is the first method to make a 2 way switching connection this is the old method. Basically this is just two single way switches on one face plate. Light switches one way two way intermediate.