We recentley erected a summerhouse at the bottom of the garden which was fine until we realised how far the electricity supply would have to travel from the house. This adds up to about 160m! Now we have four other sheds which are all linked togeather with what appears to be 4mm SWA on a 40a MCB and 80A 30MA RCD. I have connected to the last shed which is 85m from the summerhouse with 6mm SWA I have fitted a garage CU with RCD. There are 4 double sockets and lighting, the largest load will be a 2KW heater. I have earths from the third core plus the cable armour. Now to the problem all appeared OK until a vacumn cleaner was plugged in which immeadiatley tripped the house RCD but not the SH RCD, the heater was then tried which had the same effect. What are your thoughts on the size of cable from the house to the sheds 4mm, the 6mm cable that I have used, is the house RCD suitable for this length of cable? The heater was tried in the furthest shed away from the house and worked fine. The sockets in the SH will power lamps, drills etc without problem.
Thanks
Thanks