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scotsparky
hi Coljack and Rv lighting I think we are both arguing the same poin at diferent sides. I suggest testing all metalic parts from main earth terminal and esuring there all under 0.05 which proves there all connected as there all linked to main earth terminal. If it a reading of 0.05 you will get a high fault current and low touch voltage and as they are all linked then they will all be at the same potential as well. Also with the high fault current you will get the correct disconection time. The 0.05 was a figure specified by the electrical safety council when i changed a D.B for them