My(TT) electrical installation is a bit unusual. I have:
- A small consumer unit where the mains comes in with a few sockets.
- Another small consumer unit, which feeds the rear of the house. ( a dining room, bedroom and a shower room)
- A small consumer unit in the garage.
- Another consumer unit feeding the front of the house, where the kitchen, living room etc. are. ie this is the "main" one.
At present the connections are: mains---1-(temporary)-2---3 4 is not connected.
I wish eventually to achieve: mains---4---2---3 and get rid of 1.
But I will probably have to live with: mains---1- (temporary)-4---2---3 for some time.
So my question is, what is the best way to connect the sub-main in the rear of the house (2) to the "main" consumer unit at the front (4) given this will be a permanent connection. The units are only 6m apart, the cable run will be in the ceiling, not grouped, and not in contact with insulation. I had planned to connect them with 16mm T+E, but I will probably have to fit an RCBO (40A) which could trip, which would be a nuisance. So, 10mm 3-core SWA might be a better idea?
T