In position 1 when the switch is down or on com and l1 are connected together just like the one way switchin position 2 when the switch is up or off com and l2 are connected together. If this helped.

Wiring Diagram 3 Switch Gang Box Wiring Diagram
How to wire a three gang switch. Each of the gangs or switches above in fig 2 of which there are three work like this fig 3. The only place you would use such a beast is if you had three lights or sets of lights in a single room each controlled by one of the single switches. Basically this is three single gang 1 way switches on a single face plate. It can be intimidating at first but hopefully youll be more confident after watching this. How to wire three switches in a gang box seems a bit daunting just looking at it. You have only one power supply wire and three different fixtures to be wired to that power supply.
In this diagram the incoming hot wire attaches to the first switchs common dark colored terminal. 3gangswitch 3gangswitchactualdemo tbelectricals wiring in this video 3 gang switch actual demo you will fully be guided about wiring from the tools and materials needed down to connecting the. This format of light switch has three discreet switches on a single face plate. Tame the tentacles and provide the power that will allow each fixture to be operated by a dedicated switch. In depth step by step video demonstrating how to wire a multiple switch electrical box. This 3 way switch wiring diagram shows how to wire the switches and the light when the power is coming to the light switch.
The two hot wires of three wire cable connect to a pair of brass colored traveler terminals on each switch.