B
bethelec
Any clues??? Trying to test zs at Lv panel incomer fed from transformer. With main switch turned on and feed to site temps (offices, 110v trannies etc) on I get a voltage between neutral and earth. With main switch off so feed goes from transformer to lv panel incomer only I get open reading. I have disconnected earth link on earth bar and taken out earth that feeds earth nest but still no reading. All cpc's are connected. Any advice or pointers would be grateful as I am stumped