Thanks gents. Yes all 3 feeds have been identified clearly. Would it however be correct if they all share one earth 70mm single core and then bonded to each separate earth bar for normal, essential and UPS? I spoke to a chap at the ECA and he recommended I use an additional test report form and add that to the COC. This way all the circuits are identified and accounted for. Seems like a good idea. Any thoughts on this way? I would rather ask the question than do it just because they require one. People just don't seem to get it that a COC is actually really important and should be carefully considered when handing one out.