Shelly 1L: how to wire with 2 switches
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- Shelly 1L
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Flat#Violet#19856 -
30. November 2020 um 16:47 -
Erledigt
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Hi, correct me if I am wrong but it seems that you'd like to add Shelly 1L to your existing "alternative" circuit, right?
The way I did is that exactly as described in the manual, which means that I re-wired the whole thing. Do not worry, you have the right amount of cables in your wall already, you just need to wire them on a different way. First disconnect all the wires from the switches. Put your 1L to that switch where you have the "L" wire and connect it to your Shelly. Use the existing cables to re-wire the connection between the switches. You have two red wires I assume for the alternative circuit. Check and mark the same ends (same wire). Use one of them to connect the farther switch to your shelly, and use the other one as the output to your lamp.
figure 1. Original alternative circuit
figure 2. New circuit
p.s. sorry about the IC
JdM
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According to this "new" wiring diagram (figure 2) you would need 4 cables where the Switch A is located but there are only 3 wires (as per figure 1). Simply there is no direct cable from Switch A to the lamp. Do I read it right?
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@Johnydemarco
After analysing the situation the only possible solution that comes to my mind is as per below diagram:
the assumption here is though that the SW1 and SW2 inputs can accept the hot input (from L line). Not sure if Shelly 1L supports that. In here you can keep the existing 2-way switches but only 1 output is connected (to the SW1 and SW2 accordingly). What do you think?
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Hi All,
yes, theoretically you need 4 wires, but:
- 1 connects Switch A and Shelly locally, which is ~5cm long
- 1 is the "L", it is there already
- 1 is one of the wires between the two switches for "O"
- 1 is the other wire between the two switches to connect farther switch and Shelly (than goes to lamp as common for "O")
In nutshell: 3 wires + a small one have to be enough.
adorobis: your wiring seems to be okay for me, too. However, I am not sure that Shelly accepts "hot" wire.
