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I am trying to figure out if i have multiple phases at my appartment.

When i look at my junction box i see 6 groups, color coded into two groups. A1, A2, A3 and B1, B2, B3. The A and the B groups both have a 'aardlekschakelaar'.
Does this mean that i have 2 phases?

If so do i need to buy a FXK40 to couple these phases since i am using 2-way xanura products or will a FD10 suffice?

Sorry for the newbie question, i trolled the forums but couldn't find a definitive answer..

I dont think you have a 3 phase powerline.
Do you need it for the kitchen (coocking) or something?
Normal groups can divided over 'aardlekschakelaar' as well

Do you have problems right now with receiving the X10 signal on outlets

these days every group has to be protected with an Earthleak protector and there can only be 4 groups to 1 protector.
New guidelines from NEN1010.
So this just gives you the reason why you see two sets of 3 groups, very nicely devided.
No reason to believe you have 3 phase, also you can chek the meter it mostly will show you in text somewhere it is 1 phase or 3 phase.

ah, thanks for the clarification!
It seems i have just the one phase.