Is there a relay for the two-key switch so as not to lay a second wire?
Good evening. A passage switch for two bulbs is installed in the corridor, on the one hand is a two-key switch, on the other with one key. Accordingly, the two-key only has one key involved, how can one of the lamps be connected to the second key? That is, so that one lamp turns on and off with one key, and the pass switch also works with the second. It is not possible to lay an additional wire. Maybe there is a relay?
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Hello! And how are you going without passing the wire from the second key to the second lamp? If I understand correctly, now does your circuit look like the first? In order for the second lamp to turn on from the second key, you need to do it as in the second diagram. But it is clear that you do not want to lay an additional cable - that means you can use a single-channel (for 1 lamp) or two channel (for two lamps) radio relay, such as this:
Relay
First circuit
Second circuit