Because they are to be in the house not the garage. But reversing this why not connect to the house CU because there are no spare fuses and more importantly no wire on the wall that I want the sockets but there is the wire to the garage CU
I've got an mini RCBO consumer unit in the garage running directly from the RCBO consumer unit in the house. Is it possible to break the wire in-between (not the armored part outside) and put in a junction box to add a couple of additional sockets? I've tried to draw a simple diagram to show...