How to house/connect relays properly (according to DIN/ISO)

Hi,

Oh, this is the american one. It should greatly help, thanks! I will check it properly.

Surely, I will get an electrician or direct advice from him to do this, thanks for the heads up.

So, out of curiosity... If you are certifying a product for 220 V, do you have to go to test them to 1600 V?! Thanks, I will.

Actually only one of the lines is 220, the other ones are 12 V. I will carefully start with the 12 V ones when I acquire more knowledge.

If I have a 12 V adaptor (I mean, 220 V wall plug that converts to 12 V as an output), how can I calculate if this adaptor will suffice for 3 elements I want to connect?

Should I just add the amps each of them need and then check if the adaptor supplies that many and then check on a way to put all the elements in parallel?

At the beginning I thought of adding so many adaptors as elements, but maybe I could save 1 or 2. Any ideas?

I studied electricity at the university but it has been quite a while since then. I have to check that too!