Wiring – use the same junction box for two appliances

appliancesgroundingjunction-boxwiring

Complete noob here.

I'm finishing building my kitchen and the last part – the wiring of electrical oven and glass cooking plates, is presenting me with some challenges.

I am located in Germany.

The oven comes out with a 3 pronged cable (I guess active, neutral and ground?).

oven cables

The cookers were sold to me with no cable.

There is one junction box at the intended spot in the kitchen, with 5 cable grips, which is definitely 3 phase.

junction box

I'm wondering what's the best course of action with both the oven and the cooking plates.

My thoughts so far:

  • Is there a way to connect the cooking plates to the same junction box as the oven somehow, without blowing things up?
  • If not, should I just connect them to a nearby socket with a cable ending with a regular socket plug?
  • What about the oven (single phase cables) vs the junction box (3 phase)?

Note: the sockets seem to have ground clips here – see picture below.

socket

Best Answer

Get a mm and check the voltage between the wires (phases).

Ignore the green/yellow for this.

If the black is neutral (likely) then the voltage between any of the other 3 and the neutral should be around 380V.

Between any 2 phases (brown, gray, blue) should give you 230V.

So, as the load on phases should be balanced, I suggest you get a competent electrician to check and connect this for you. That way (s)he can check which appliances are on which phase.

I had an issue with my hob.. puled the oven out to clean it and a wire popped out for the hob. Not thinking I put it back (blue to blue)... Massive bang and off to buy another hob :) happy days... Made sure of the voltages before connecting the new one...