hi all. In my French property I have a shed with a fuse box that has been wired in. A green/yellow wire goes to the earth bar, a blue wire goes to the N input and a red wire goes to the other input. I have added 16a and 10a trip switches and connected them using two bars which slot in. I have wired in a new socket going to the 16a trip, with N going to N, L going to 2 and earth going to the earth bar. But it trips as soon as I plug anything in and turn it on. The 16atrips, along with the input 40a trip, along with the main trip in the box in the hall. Any thought please? Dave