One of the keys in the three-key switch does not work
There was a two-key switch. Two wires are connected to it from above, one of them is phase, and also one wire from below (apparently zero). All wires are brown. I decided to connect an additional lamp. I bought a three-key switch. I connected to it two old wires on top, (one of them is phase), and on the bottom the old wire (apparently zero). Next, I connected one wire from the new luminaire on top, and connected the second wire of the luminaire from below. The first and second beak and tires turn on the light, and the third key does not turn on the new lamp. Please explain what’s the matter? Thank you in advance.
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Hello! First of all, what did you check for what is zero and what is phase? Secondly, zero is not supplied to the light switch at all, it goes directly to the lamp. Only a break phase is applied to the switch. Thirdly, I attach the connection scheme for the three-key light switch. You must disconnect the wires in the same order. And even better - call the master, if there is no experience in working with electricity.
Thank you so much. All clear.