8/8/2023 0 Comments Two way light switch wiring![]() ![]() If you are using metal light switches (fig 6) make sure you connect the earth wire to the earth terminal on the switch. The red wire is connected to the common (C) terminal, the black wire is unused and should be connected in a plastic terminal block and the earth wire is connected to the earth terminal.Ī metal light switch must be earthed as seen below. The cable going to the ceiling rose or junction box is connected as follows (fig 5). The red wire is connected to the (L1) terminal, the black wire ( marked with red tape or red sleeving) is connected to the (L2) terminal and the earth wire is connected to the earth terminal. The cable coming from the first light switch is connected as follows (fig 5). The second two way light switch is also quite easy to wire up. If you are using a plastic switch the earth wires will need to be connected to the terminal in the terminal box (as shown above) because there are no earth terminals on plastic switches. The cable going out to the second light switch is connected as follows (fig 4). The red wire is connected to the (L1) terminal, the black wire is unused and should be connected in a plastic terminal block and the earth wire is connected to the earth terminal. The feed cable going to the first switch is connected as follows (fig 4). The first two way switch is quite easy to wire up. The red wire going to the next junction box is connected to the same terminal as the red wire from the feed cable, the black wire going to the next junction box is connected to the same terminal as the black wire from the feed cable and the earth wire going to the next junction box is connected to the same terminal as the earth wire from the feed cable. The cable going to the next junction box is connected as follows (fig 3). The following picture is exactly the same as the picture above with the addition of another cable which provides the feed for the next junction box. The red wire coming from the ceiling rose is unused, the black wire coming from the ceiling rose is connected to the same terminal as the black wire from the feed cable and the earth wire coming from the ceiling rose is connected to the same terminal as the earth wire from the feed cable. The cable coming from the ceiling rose is connected as follows (fig 2). The red wire going to the switch is connected to the same terminal as the red wire from the feed cable, the black wire is unused, and the earth wire is connected to the same terminal as the earth wire from the feed cable. The cable going to the first light switch is connected as follows (fig 2). The earth wire must be covered with green/yellow sleeving. The feed cable comes from a previous junction box or from the consumer unit, the red, black and earth wires are connected to separate terminals. The junction box should be wired as shown below. ![]() Line diagram of a two way lighting circuit using junction boxes (fig 1). Two way lighting circuit using twin & earth cable ![]()
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