I'm putting a remote CU in the (integral) garage which will be connected from the main cu in the house. The remote cu will supply a small radial circuit (3-4 sockets) AND a lighting circuit. What is the optimum setup for this? ie mcb at main cu, mcb at remote cu, cable size (I was going to use 4mm from main cu to garage cu but nowhere seems to sell it!) Main cu will be rcd protected.
Lighting circuit would be two*outside lamps with pir, and a fluorescent strip 63W.
Many thanks for any help!