Double-key switch does not work properly
Hello, I have such a question! 3 wires stick out from the ceiling （blue, brown and yellow-green). On the wall is a two-gang switch (both keys are connected, one wire at the input, 2 wires at the two outputs). I try the wires sticking out of the ceiling with a test lamp, with the left button of the switch turned on: blue + brown — the lamp is on; blue + yellow-green-lamp is on. It turns blue-zero, brown and yellow-green phases with the switch keys!
But what is the question. Why does the wire leave the right key, but when it is pressed, the test lamp does not light up in any situation, and when the left button of the switch is on, the lamp lights up in two cases: blue + brown and blue + yellow-green. How is this possible? Because of this, I can not use the second key!
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The correct connection diagram for the two-key light switch is provided in the article. https://our.electricianexp.com/en/elektricheskaya-sxema-podklyucheniya-dvuxklavishnogo-vyklyuchatelya.html
It's all about the junction box, you need to look at what kind of wiring there is.
This is what I understand!
I ask you to explain how one switch key can open 2 phases simultaneously？
Alternatively, 2 wires connected to one key, that’s all. Disassemble the switch to start.
Please read my question, I write there that both keys leave one wire. I took it apart!
So see how the wires were disconnected in the junction box. The picture should be fully outlined.
If the wiring is done correctly, then yellow-green is the earth. A blue phase is visible. Therefore, what sticks out of the ceiling should work with only one key. I didn’t see two phase wires coming to the switch.