Why does it go back to the same 30/32A MCB?
The cable is 2.5mm2 and you use a 30/32A breaker? How is this wire protected for over Ampering?
The idea is that, since you have two cables you can double the fuse. 16A coming from one side of the ring and 16A coming from the other.
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Therefore 2.5mm2 is sufficient. If the load is not connected at the middle of the ring or if it is not evenly distributed along the ring, there will be an unbalance in the load: You might have 20A on one side and 12A on the other.
If for some reason the ring is broken or the load is connected very close to the breaker, there is nothing to protect the 2.5mm2 cable. It could carry the full 32A. Would you like to have a system like this? Personally, I find it scary.
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What type of curve do you have to use in breakers (B/C)?
I leave it to the Brits to answer this, but what do you use in Belgium? Please tell me you use type B for sockets! Do you use 20A or 16A for them, BTW?
