Question about installing a voltage relay in an apartment
Please tell me how to properly connect the voltage relay to the apartment. I want to install the relay in the shield in the entrance. An RCD of 40A is in front of the counter, and after the phase it diverges into three machines, one 25A and two 16A each. As far as I understand, the relay needs to be placed after the counter in front of the machines, that is, we take the phase after the counter, and where to get zero, as I understand it, it serves only to control the relay itself. Some say that you need to take zero before the RCD, so that the RCD works correctly, while others say that you can take from the bar where all my zeros go. How right? And yet, will a 40A relay be enough, or should I take it with a margin?