I have inherited a house with an annexe in the garden.
the annexe has a 63amp RCCB in a 6 way board with a B20 three B16 and one B6 and one spare.
the annexe is supplied by a 3 core SWA 6mm cable that runs about 40 meters. The cable runs surface mounted externally back to the meter which is external in a coveted alleyway. This cable goes back to a fused consumer unit and then via Henley blocks to the 100a meter.
I have added up all the appliances etc in the annexe and the total max wattage comes to about 10kw.
the cable size seems a bit small but changing it would not be easy. So my question is how do I protect the cable in this situation?