Hi all i want to get a shower fitted in my barn for the horses, now i have a 6mm swa running from my fuse box on a 50amp mcb with rcd about 60meters to the barn, in the barn there is a 5way fuse box mcbs but not rcd, one the fuse box is a socket circuit with 3 sockets 16amp, a lighting circuit with 6 flu on 6amp, outside lights with 3 floods on 6amp, and a 4mm swa to my tractor shed on a 32amp, and a free slot. Now what would be involed in puttin a cable in for a shower in the barn is it a big job are can we just use the free space with what i have explaned and a ruff cost if possable thank you any more info just ask