I have taken a spur from an internal socket via armoured cable to my garden shed, some 10 metres away. It works fine. I run a small 15 w flourescent light from it and socket for drill. I have now built another shed which also requires power with similar power requirements. Can I connect the new shed to the old shed in series? Can I connect it in parallel from the original internal socket? Or should i find another internal socket to connect from?