Connecting ground cables to a Shelly

[Lampie]

Unfortunately I can't figure out how to make the simplest circuit imaginable. All examples of circuits and diagrams assume a light switch or a socket.

For reasons that are important to me I want to interrupt a (ground) cable. the ground cable has 3 cores:
- a brown phase wire L
- a blue neutral wire N
- a green/yellow ground wire

which shelly can I best use? I don't need to measure the current, I just want to be able to "interrupt" it wirelessly, only 100w for a few led lights, so specs like max 2000w or 16A all good!

I can imagine:

cable A and cable  B

- the L wire of cable A in on the L of Shelly.
- do not connect the ground wire (green-yellow) to the shelly but connect them between cable A an cable B directly 
- but what should I do with the blue neutral wire? I can imagine plugging cable A blue wire it into the shelly on the N.. but via what does this then run back to the other blue neutral wire in cable B? 

Edited November 13 by Lampie
Foutje

[thgoebel]

Please have a look at this:

Hopefully, your questions are answered…